A, as a part of the introduction because it’ll back up your thesis statement.
It is false that the Gibbs family owns the blanket factory. It is Mr. Cartwright who owns the blanket factory.
There are millions of things
Motives (a motif)
A motif is a short musical phrase that repeats or reoccurs inside a composition that usually has some sort of importance to the theme or overall meaning of the piece. It's the smallest unit that still contributes to the theme of a composition.