Suppose you purchase 100 shares of GM stock at the beginning of year 1 and purchase another 100 shares at the end of year 1. You sell all 200 shares at the end of year 2. Assume that the price of GM stock is $50 at the beginning of year 1, $55 at the end of year 1, and $65 at the end of year 2. Assume no dividends were paid on GM stock. Your dollar-weighted return on the stock will be your time-weighted return on the stock. O a. the same as O b.exactly proportional to O c. less than Od higher than