You invest $10,000 in a fund on 1/1/08 (month/day/year). On 5/1/08, you withdraw $2,000 from the fund. On x/1/08, you deposit another $3,000 into the fund. On 12/31/08, your fund is worth $15,000. The annual dollar-weighted rate of return on your investment during 2008 is 40.3%. Which of the following is closest to the date x/1/08? (For the dollar-weighted rate of return, assume simple interest from the date of each deposit or withdrawal.) O a. 6/1/08 O b. 9/1/08 O c. 10/1/08 O d. 8/1/08 e. 7/1/08