Which one of the following is true?

If the stock price will rise, a call on stock or short sale position on the stock will profit from the price increase.

A call contract holder has the obligation to buy the underlying asset at a specified price

A call gives its holder the right to sell an asset for a specified exercise price on or before a specified expiration date

The difference between the price at which a dealer is willing to buy, and the price at which a dealer is willing to sell is called the bid ask spread.