The Phylogeny of a Group of Species You Are Studying

The phylogeny of a group of species you are studying shows that fast growth and low investment in defense is ancestral in the group, while a recently diverged subgroup containing 10% of the group's species is characterized by slow growth and epidermal hairs filled with a caustic agent. You hypothesize that:

A) hairs were an evolutionary innovation that allowed these plants to invade lower resource environments than the ancestors of the group occupied.
B) hairs were an evolutionary innnovation that allowed the plants to invade all types of environments.
C) hairs are an evolutionary innnovation that allowed these plants to invade higher resource environments than the ancestors of the group occupied.
D) the evolution of leaf hairs in this group does not support the "escape and radiate" hypothesis.