Suppose That the Mean Time for a Certain Car to Go

Suppose that the mean time for a certain car to go from 0 to 60 miles per hour was 7.8 seconds. Suppose that you want to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer than 7.8 seconds. What would you use for the alternative hypothesis?

A) H₁ : $\mu$ < 7.8 seconds
B) H₁ : $\mu$$\gt$ 7.8 seconds
C) H₁ : $\mu$ = 7.8 seconds
D) H₁ : $\mu$$\ge$ 7.8 seconds
E) H₁ : $\mu$$\le$ 7.8 seconds