I believe that 4. is A, more or less if a native is born on reserved land then his kids, would not have any access to the fundamentals of being a native and they do not want them growing up like that.
I believe that 5. is D, given the information in the answer choices the Indian war, the war was not about slavery, was not about money, it was overland, the Indians land. All the answer choices give reason that are not even close to the real war issues but the Indians did move a lot so the only thing left is D.