Help me please hurry

I think it is A

A. It is the writer's idea or opinion about a topic

Explanation:

The claim or the "thesis" of an essay describes the author's stance on a specific topic or issue in an argumentative essay.

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.

its c not d   tell me if that´s correct