Answer:
Correct answer is option C, that is, conduct a survey of local businesses.
Step-by-step explanation:
In the given case, Alan desires to promote the application of solar power as a sustainable source of energy for the businesses in the city. It seems that he wants to impart certain modifications in the energy source of the businesses in the city. Thus, it seems apparent to conduct a survey of the local stores, and this will be the most efficient way for him to attain the goal. Once a study is done Alan can decide for the next step.