Homosporous Plants Bear a Single Type of Spore That Gives

Homosporous plants bear a single type of spore that gives rise to one type of gametophyte.Heterosporous plants produce two types of spores resulting in two distinct gametophytes—one male and one female.What is a plausible explanation for the evolution of separate male and female gametophytes in heterosporous plants?

A) Consolidating male and female gametes on a single plant ensures close proximity of gametes during mating.
B) Separating male and female gametophytes prevents dessication.
C) Consolidating male and female gametes on a single plant shortens generation times by reducing the distance sperm travel to fuse with the egg, thus allowing for faster rates of evolution.
D) Separating male and female gametophytes reduces the risk of being eliminated by predation.
E) Separating male and female gametophytes promotes outcrossing and results in greater genetic diversity of offspring.