Here is the question An investor owns 10 MMM May 50 Calls. MMM increases to $60, and the investor exercises the calls. The investor tells his registered rep to sell the stock immediately after purchase. If all these trades happen in a margin account, how much must the investor deposit. A. 3000 B. 30,000 C. 35,000 D. No deposit is required. I have the answer, but want to hear how you guys would look at this question. Thank you for your help.