Which question can be answered by following the scientific method?
a. what was the highest temperature that was recorded yesterday?
b. what is the most interesting aspect of the light-dependent reactions?
c. how does a change in temperature affect the stomata of a plant?
d. how many stomata are there on this leaf?

The best answer to the question: Which of the following questions can be answered by following the scientific method? Would be, C: How does a change in temperature affect the stomata of a plant?

Explanation:

The reason is that this one question allows for all the steps of scientific research to take place, but most importantly, because to answer the question you would actually need to follow the scientific method. This is the type of question where you need to test the hypothesis, not just recollect already present data, which is the case for most of the other choices. In here, you would have variables, dependent and independent, you would have to manipulate them, and see the results in time to be able to predict, or answer how temperature actually affects that part of a plant. It is the one question from all that actually leads to research, to testing and to conclusions that are born from observation, hypothesis creation, testing and measuring.