Despite inhabiting overlapping ranges, the western spotted skunk and the eastern spotted skunk do not interbreed, partly because the western species breeds in early fall and the eastern species breeds in late winter to early spring. this is an example of isolation.
a. chemical
b. gametic
c. post-zygotic
d. temporal
e. mechanical

D. temporal

Explanation:

Temporal isolation is a reproductive barrier that occurs when two similar members of a biological population occupying the same habitat breed at different times of the day or at different seasons. When this occurs, the two similar members would be unable to mate with each other. Over time, both individuals become entirely two different species through this evolutionary mechanism

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction