You are given a science question (easy-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.

Example Input: In a classroom demonstration, a teacher pours sulfuric acid on some granulated sugar in a beaker. The sugar turns yellow and then black. Smoke rises and a strong smell is released. This demonstration is an example of what kind of change?  
 (A) chemical (B) physical (C) magnetic (D) electric
Example Output: A

Example Input: Earth is about 81 times more massive than the Moon. How will the mass and weight of a rocket on the Moon compare to its mass and weight on Earth?  
 (A) The mass and weight will be less on the Moon. (B) The mass and weight will be greater on the Moon. (C) The mass will be the same, but its weight will be less on the Moon. (D) The mass will be the same, but its weight will be greater on the Moon.
Example Output: C

Example Input: An agriculturalist predicts that the tomato harvest will be very good this year. Which has the greatest effect on the size of the tomato harvest?  
 (A) the time of day the seeds are planted (B) the amount of fruit picked after dark (C) the type of soil in which the crops are grown (D) the number of times daily that the farmer observes the crop
Example Output:
C