What were two major problems that arose on the Western
frontier during the early years
of the American republic?

because he had a big bear belly

i would say b. research typically uses a variety of sources

if you have to make a general question and respond to your thoughts, then this isn't really a question someone can you on. read the passage, form your question, and answer using your thoughts. no one else can understand how you interpreted this text if you don't tell us.