During Spring Time in Maine,male Moose Often Enter a Cow

Multiple Choice

During spring time in Maine,male moose often enter a cow pasture and begin calling to the female cows.The moose may even try to mount the female but the male moose genitalia do not fit properly inside the female cow genitalia.This is an example of

A) mechanical isolation.
B) temporal isolation.
C) habitat isolation.
D) behavioral isolation.
E) gametic isolation.