In a Comprehensive Review of Research on the Role of Biology

In a comprehensive review of research on the role of biology in determining sexual orientation, the authors concluded that

A) biological factors play a stronger role in determining sexual orientation in men compared to women.
B) biological factors play a stronger role in determining sexual orientation in women compared to men.
C) biological factors play little, if any, role in determining sexual orientation.
D) biological factors play equal roles in determining the sexual orientation of men and women.