Who is Trevor's relative who was a WAC during WWII most likely to be?
A relative of Trevor who was a WAC during WWII is likely a woman, as WAC stands for Women's Army Corps, a branch of the U.S. Army during the war.
Explanation
If Trevor has a relative who was a WAC during WWII, it means that his relative was most likely a woman. WAC stands for Women's Army Corps, which was a branch of the U.S. Army established during World War II. These women worked in various capacities, both home and abroad, to support the war efforts. They were involved in a variety of roles such as clerks, radio operators, mechanics, and nurses, among others. Therefore, Trevor's relative who was a member of the WAC was probably a woman who served in some capacity during the war.