This is a strengthen with necessary premise question, which means that the correct answer is something that the argument depends on. When looking through answer choices, we should be asking ourselves, "Does the argument need this to be true?" If the answer is yes, then it is the correct answer. First, let's break down the argument. There is only one significant premise.
Premise: The lending nation sets the terms of its dealings with the borrowing nation. Conclusion: A borrowing nation cannot be a world leader.
B. A nation that can set the terms of its dealings with other nations is certain to be a world leader.
Remember to use the negation test when considering the answer choice. If we negate the correct answer, then the argument will fall apart. Let's try it with B.
A nation that can set the terms of its dealings with other nations is NOT certain to be a world leader.
Does our argument fall apart? No, because our conclusion is about borrowing nations. We don't care if every lending nation is certain to be a world leader. We want to say that no borrowing nation can be a world leader.
Let's try the negation test on the correct answer, C.
A nation that has the terms of its dealings with another nation set by that nation CAN be a world leader.
This destroys the link between our one premise and our conclusion. If C is not true, then the argument falls apart, making C the correct answer.
