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.

Input: Consider Input: Use of nuclear fuel would most likely reduce human contributions to which environmental problem?  
 (A) ozone thinning (B) landfill creation (C) shoreline erosion (D) greenhouse heating

Output: D


Input: Consider Input: A pot is heated on a stove. Which process causes the metal handle of the pot to also become hot?  
 (A) combustion (B) convection (C) radiation (D) conduction

Output: D


Input: Consider Input: Louis Pasteur's work in the nineteenth century on pasteurization greatly improved  
 (A) the quality of food. (B) the prediction of weather. (C) the availability of medication. (D) the effectiveness of vaccinations.


Output: A