Investor A uses options for defensive and income reasons. Investor B uses options as an aggressive investment strategy. What is an appropriate use of options for investors A and B, respectively?

a. Writing covered calls/buying puts on stock not owned

b. Buying out-of-the-money calls/buying puts on stock owned

c. Writing naked calls/buying in-the-money calls

d. Selling puts on stock owned/buying puts on stock not owned.