Answer;
D. What is the effect of paper bags on the environment?
This is an example of a question that can be answered by science.
Step-by-step explanation;
To answer a question science constructs theories, and then compares them to empirically-collected data, and decides which theories provide better fits to the data. For example to the question, "What is the effect of paper bags on the environment?" can be answered using science, by developing a hypothesis, that paper bags have a negative effect on the environment, then collecting data experimentally and then deciding whether the hypothesis is acceptable.