That will be the answer because you stink
Answer: No the question "Which credit cards do my friends use?" would not be answered by the selection "Credit Cards-Credit Where Credit's Due" because the selection is talking about the credit and where it is due not about the type of credit card your friend has or uses.
Explanation: I think the answer would be no because it is about Credit Cards-Credit not about them advertising their credit cards in themselves. It would have been different if the selection was something around the lines of "Which Credit Card Is Used Most" or "Credit Cards People Use But Which Is Best?"
I think you are missing a dash thing in between the words "mid" and "May".
Answer:
Sentence #1 gives context to sentence #2.
Explanation:
If sentence #2 was a standalone, we wouldn't know why tutors would develop egos, but with the info #1 provides us, we know why they feel superior to their students.
Hope this helps!