as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
generate a multiple-choice question about renewable energy.
user
which of the following is not a renewable source of energy?
a. solar
b. hydropower
c. wind 
d. nuclear 

answer: d. nuclear.
assistant