Final answer:
Positive statements describe what happens and why it happens, are testable, and do not necessarily have to be true, so the correct answer is 'All of the above.'
Step-by-step explanation:
The student's question relates to the characteristics of positive statements in economics or social science. Positive statements are statements that describe what happens and why it happens, and they are testable through empirical observation or experiments. While they are structured to reflect reality and aim to be factual, it is not a requirement that they are true since they must be verifiable or falsifiable through testing. Therefore, the correct answer to the student's question would be. All of the above,' encompassing that positive statements are testable, are attempts to describe what happens and why it happens and do not necessarily have to be true statements.