Question

athletes that take testosterone hope to

build more muscle mass

eliminate muscle mass

become more flexible for their sport

Explanation:

Testosterone is an anabolic - androgenic steroid. Anabolic effects include promoting muscle growth. Athletes often take it to enhance physical performance by increasing muscle mass. Eliminating muscle mass is the opposite of what anabolic steroids like testosterone do. While flexibility can be important in sports, testosterone's primary role in this context is related to muscle - building, not directly to flexibility.

Answer:

build more muscle mass