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: If 1 kg of the compound toluene melts at -95°C, then 500 g of toluene will  
 (A) melt at -47.5°C. (B) melt at -95°C. (C) boil at 95°C. (D) boil at 47.5°C.

Output: B


Input: Consider Input: Ella waves good-bye from the bus. What body system pulls on bones to let Ella wave her arm?  
 (A) muscular system (B) nervous system (C) digestive system (D) circulatory system

Output: A


Input: Consider Input: Which adaptation allows a fish to get oxygen underwater?  
 (A) fins (B) lungs (C) gills (D) heart


Output: C