The First-Order Reaction A $\rightarrow$ B, Has K = 5

The first-order reaction A $\rightarrow$ B, has k = 5.67 s^-1. If [A]₀ = 0.500 M, how long will it take [A] = 0.124 M?

A) 0.122 s
B) 0.100 s
C) 8.18 s
D) 0.244 s
E) 0.488 s