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.

Input: Consider Input: The best example of balanced forces is a  
 (A) car increasing speed. (B) bus parked in a garage. (C) ball kicked along a flat surface. (D) roller coaster slowing down on an incline.

Output: B


Input: Consider Input: Which of these objects is translucent?  
 (A) A student's notebook (B) A mirror on the bus (C) A brick wall of the school (D) A student's sunglass lenses

Output: D


Input: Consider Input: Several students are entering a bridge building contest that requires using ice cream sticks and glue to construct the strongest bridge possible. The bridges must be 5 in. wide and span a length of 18 in. Which of the following tests is the most accurate way to determine the strongest span design for these bridges?  
 (A) roll toy cars across each bridge until it collapses (B) place concrete construction blocks on top of each bridge until it collapses (C) stack coins on both ends of each bridge until it collapses (D) place D-cell batteries at the center of each bridge until it collapses


Output: D