Eda wishes to invest her 200,000 TL and maximize her return. Her three alternatives are - CDs, which pay 6 percent; stocks, which have an expected return of 13 percent; and mutual fund, which is expected to return 8 percent. She has decided that any or all of the 200,000TL may be invested. She wants to have some money invested in all three alternatives. The variables are defined as follows: C= TL invested in CDs S = TL invested in stocks M = TL invested in mutual fund Eda has decided that the amount invested in stocks cannot exceed one-fourth of the total amount invested. Which is the best way to write this constraint? a. - C + 4S - MSO b. - C + 3S - Mso c. S