Choose the Answer Which Best Rewords the Italicized Portion

Multiple Choice

Choose the answer which best rewords the italicized portion. If you think the original wording is best, choose option A.
The trees provide shelter to monarch butterflies they are also essential for the communities that surround the forests.

A) butterflies they are also essential
B) butterflies and they are also essential
C) butterflies; and they are also essential
D) butterflies, and they are also essential