Answer:Option C
Step-by-step explanation:
Feminism can defined as the advocacy of sex equality for women, be it in political, social or culture environment.
The best options that best explains feminism is option C, because it has that word "equality" .People that fight for this equality and stand to protect it are referred to as feminists.
So therefore feminism is best defined as related to the question as a doctrine advocating full political, economic and social equality for women.