Two Objects, a and B, Are Placed on an Inclined $\mu$

Multiple Choice

Two objects, A and B, are placed on an inclined plane that can be rotated to different angles of elevation. A starts to slide at twice the angle of elevation that B starts sliding. The respective coefficients for static friction for A and B are $\mu$ _A and $\mu$ _B. Choose the last answer that is correct.

A) " $\mu$ _B > $\mu$ _A"
B) " $\mu$ _A > $\mu$ _B"
C) " $\mu$ _B = 2 $\mu$ _A"
D) " $\mu$ _A = 2 $\mu$ _B"