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.
Genetic modification, also called genetic engineering, the alteration of genetic material through processes not found in nature.

A) modification, also called genetic engineering, the alteration
B) modification, also called genetic engineering, is the alteration
C) modification, also called genetic engineering, are the alteration
D) modification, also called genetic engineering, were the alteration