You will be given a definition of a task first, then some input of the task.
You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Wind turbines are being used to generate electricity in many parts of the United States. One advantage of wind turbines is that no fossil fuels are burned. Which of the following is a disadvantage of wind turbines?  
 (A) Wind turbines can emit dangerous radiation if damaged. (B) Wind turbine farms must be located near large bodies of water. (C) Wind turbines do not produce energy until many years after being built. (D) Wind turbine farms require a lot of area compared to how much energy they produce.
Output:
D