Why Do Nuclear Fusion Reactions Only Take Place in the Interior

Multiple Choice

Why do nuclear fusion reactions only take place in the interior of a star

A) The magnetic fields are strongest there.
B) The temperature is the hottest in the center.
C) The density of material is very high in the center.
D) The temperature is the hottest in the center and the density of material is very high in the center.
E) FALSE; Nuclear fusion reactions can take place in the core and corona where temperatures are high enough.