9. The founders own 100,000 shares of the start-up company stock under a five-year vesting arrangement with an equal amount vested each year. The only investor in the start-up also owns 100,000 shares of stock for 50% ownership. There is also an executive option pool with 10,000 shares that are also vested evenly over five years. At the end of year three the founders will have how many shares of vested stock? A. 66,000 . B. 100,000 . C. 110,000 . D. 60,000