I think the correct answer is A.
Answer:
a. to help you determine if facts from books and movies are accurate
all the best
Explanation:
True oxidation is the formation of rust so yes it is a chemical change
The Knight is dressed in a tunic made of coarse material ; he wears a suit of armor that is stained by rust. He has a horse which he take care of it better than himself.
You could seek the help of a tutor to understand more about the class, and learn new things.