Answer:
The position states a point of view that disagrees with Aristotle's.
Explanation:
The position, or claim, is a statement that contains how the writers feels on the topic, not an introduction to the topic itself, so the first answer is incorrect and can be eliminated.
The introduction begins with presenting Aristotle's point of view on having many friends; however, this isn't the writer's view, as they claim that Aristotle's point isn't valid in sentence 3. Since there is a position present <em>and</em><em> </em>it disagrees with Aristotle's, the second and fifth answers are incorrect and the third answer, being the opposite of the second, is correct.
The writer simply asserts that it is possible to have a large number of true friends, but doesn't present any reasons why this is true (extroverts are better at making friends, one simply needs to put a little more work into their friendships, etc.). Therefore, the fourth answer is incorrect.