Diego exercised a nonstaturtary stock option on February 28 2020. he purchased 500 shares of his company's stock for 10000. The FMV of the stock at the time was 12000. He included 2000 difference between FMV and the purchase price when he filed his 2020 return. What is Diegos basis in the underlying stock. a. 0 b. 2000 c. 10000 d. 12000