suppose you invest your money in 100 shares of Abbott Labs (ABT) at $50 per share, 100 shares of Lowes (LOW) at $30 per share, and 100 shares of Ball corporation (BLL) at $40 per share. Suppose over the next year Ball has a return of 12.5 %. Lowes has a return of 20%. Abbott Labs has a return of -10%. The return on your portfolio over the year is?

a. 0

b. 7.5%

c. 3.5%

d. 5%