How could you best restate this question to encourage yourself to ask questions rather than simply collect information

To encourage yourself to ask questions rather than simply collect information, you should ask "How does a country's population size contribute to its levels of air pollution?" (Option A).

With this type of question, you are going to find information related to the topic that will make you come up with new questions such as why is the population a factor in air pollution or whether the country's policies prevent air pollution or not.

With the other questions, you will only get information about certain countries like the US or Canada or pollution in relation to the size of the country instead of its inhabitants and policies.

dependent clause!

example: "before the food gets cold"

answer: it is true that students often work and do household chores, but managing homework in addition to other responsibilities students learn to organize their time efficiently and prioritize their studies.

the first argument attacks those who disagree, asking them to be "realistic" and "accept facts." this is not conducive to healthy debate and disagreement. the second one only takes into account a section of the student population, and ignores the other one. finally, the third option offers only anecdotal evidence. it is only the last option that provides a well-constructed argument in a persuasive way.