Use the Information Below for the Following Problem(S)

Use the Information Below for the Following Problem(S)
The annual rates of return of Stock Z for the last four years are 0.10, 0.15, -0.05, and 0.20, respectively.
-Refer to Exhibit 1.10.Compute the arithmetic mean annual rate of return for Stock Z.

A) 0.03
B) 0.04
C) 0.06
D) 0.10
E) 0.40