Explanation: The Spanish were interested in preserving their stranglehold over the whole of the New World. Eliminate (A) because the Barbary States would actually be east of the line. Eliminate (C), as the Spanish conquistadores ended up conquering the natives who were in their way. Eliminate (D) because the relative ease of conquest played very little role in the diplomatic negotiations for the Treaty of Tordesillas. You’re left with (B), which is the answer.