instruction:
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.
question:
Two chemicals react in a beaker that has water droplets on the outside of the bottom of the beaker. The water droplets freeze. Which statement best describes the reaction?  
 (A) Endothermic because energy is absorbed. (B) Endothermic because energy is released. (C) Exothermic because energy is absorbed. (D) Exothermic because energy is released.
answer:
A


question:
Which of these meals would give you most of the nutrients that you need?  
 (A) Meat, milk, and a piece of chocolate (B) Bread, vegetables, and fish (C) Vegetables, fruits, and water (D) Meat, fish, and bread
answer:
B


question:
Alan is using cabbage juice to determine the relative pH of various household solutions. Which of these steps communicates the results of his investigation?  
 (A) Conduct multiple trials (B) Write down a procedure (C) Identify the materials to be tested (D) Record observations and data in a journal
answer:

D