Belief perseverance is the correct answer.
Belief perseverance, also known as belief persistence, is the tendency that a person has of maintaining one's belief even when there are enough evidences that firmly contradicts it. It is very hard to overcome belief persistence since it requires people to learn about the existence of bias and to accept explanations that support the opposing belief.
Answer: C
Explanation: Correct me if I'm wrong but I'm pretty sure it is C because India and China have a huge population.
Absolutely. If you are stressed or less confident, you will generally do worse on tests and general assignments.
Also, this is in Social Studies, it should be in Health or related subjects.