AB Hernandez is a transgender athlete. She won gold medals in jumping. Some people were not happy about it. A new rule let her play. This rule lets transgender students play on teams that match their gender. Some people protested. They do not want transgender athletes in girls' sports. The new rule was made because of Hernandez and a law. But some people think the new rule is confusing. Most adults in the US think transgender female athletes should not play in girls' sports.