The author uses the second paragraph to provide a specific example of how property law - a subset of common law - can be used to provide a basis for some claims. This is supported by lines 24-28 "common law may provide a basis for some Native American claims.... Property law, for example..." The author explicitly tells us that property law is an EXAMPLE used to illustrate the statement that "common law may provide a basis." Hence we can conclude that (A) is the correct answer.
