Answer:
A
Explanation: Its not focused on one movie. Teachers find that kids doing history related stuff get better grades because of this. Silent films are also very easy to research.
Answer:
Every year, between three and four
million dogs and cats are euthanized
because there is simply no room for them.
I don't know but a long essay or dissertation is involving personal research, written by a candidate for a college degree.
I say it's B but I might be wrong