According to the best available evidence from psychological research,sexual orientation is

A) related to biological factors.
B) related to environmental factors.
C) a personal choice.
D) able to be changed with certain kinds of therapy.

Sexual Orientation

A person's emotional, romantic, or sexual attraction to others, often categorized as heterosexual, homosexual, bisexual, asexual, etc.

Psychological Research

The scientific study of mental functions and behaviors aimed at understanding individuals and groups.