The Following Drawing Is a Representation of a Reaction of the Type

The following drawing is a representation of a reaction of the type A → B,where different shaded spheres represent different molecular structures.For this reaction ΔH° = +45 kJ.This reaction is likely to be

A) nonspontaneous at all temperatures.
B) nonspontaneous at low temperatures and spontaneous at high temperatures.
C) spontaneous at low temperatures and nonspontaneous at high temperatures.
D) spontaneous at all temperatures.