Consider a Reaction of the Type AA $\to$ Products in Which the Rate Law Is Found to Be

Consider a reaction of the type aA $\to$ Products in which the rate law is found to be rate = k[A]³ (yes,a termolecular reaction is improbable but possible) .If the first half-life of the reaction is found to be 40 seconds,what is the time for the second half-life?

A) 10 seconds
B) 20 seconds
C) 80 seconds
D) 160 seconds
E) 320 seconds