Does the Average Distance That a Neutron Travels Through Fissionable

Multiple Choice

Does the average distance that a neutron travels through fissionable material before escaping increase or decrease when two pieces of fissionable material are assembled into one piece? Does this assembly increase or decrease the probability of an explosion?

A) The average distance increases while the probability of an explosion also increases.
B) The average distance decreases while the probability of an explosion decreases.
C) The average distance increases while the probability of an explosion decreases.
D) The average distance decreases while the probability of an explosion increases.