What does 态度 mean in 她礼貌不礼貌是她的态度?
It's easy to get tangled up between languages and end up confused. Teech was probably in a hurry and a bit confused. 

My tip: take your original language and simplify it as much as you can, then translate. If that doesn't do it, paraphrase, then translate.

态度: attitude towards someone or something

相反，孔琳其实并不在乎，她不能决定别人的性别，但是她可以决定自己的态度。