Please double check my answers, also I'm stuck on the multiple choice one

Suppose the DJIA stands at 11,200. You want to set up a long straddle by purchasing 100 calls and an equal number of puts on the index, both of which expire in three months and have a strike of 112. The put price is listed at $1.65 and the call sells for $2.65. a. What will it cost you to set up the straddle, and how much profit (or loss) do you stand to make if the market falls by 750 points by the expiration dates on the options? What if it goes up by 750 points by expiration? What if it stays at 11,200? b. Repeat part a, but this time assume that you set up a short straddle by selling/writing 100 July 112 puts and calls. c. What do you think of the use of option straddles as an investment strategy? What are the risks, and what are the rewards? a. To set up the long straddle, it will cost $ 430. (Round to the nearest dollar. Enter a positive number for the cost.) If the market on the long straddle falls by 750 points by the expiration dates on the options, the profit (or loss) is $320. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market goes up by 750 points by the expiration dates on the options, the profit (or loss) is $320). (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market stays at 11,200 by the expiration dates on the options, the profit loss) is $ - 430. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) b. Your revenue from setting up the short straddle is 5 430. (Round to the nearest dollar.) If the market on the short straddle falls by 750 points by the expiration dates on the options, the profit (or loss) is $ - 320). (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market goes up by 750 points by the expiration dates on the options, the profit (or loss) is $ - 320). (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market stays at 11,200 by the expiration dates on the options, the profit loss) is $430 (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) c. What do you think of the use of option straddles as an investment strategy? What are the risks, and what are the rewards? (Select the best choice below.) O A. Option straddles are extremely risky. For larger movements in the market, the short straddle will start gaining money and the long straddle will start losing money. OB. Option straddles are not very risky. For larger movements in the market, the short straddle will start gaining money and the long straddle will start losing money. OC. Option straddles are not very risky. For larger movements in the market, the short straddle will start losing money and the long straddle will start gaining money. OD. Option straddles are extremely risky. For larger movements in the market, the short straddle will start losing money and the long straddle will start gaining money