instruction:
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.
question:
Which of the following properties best describes a material's ability to resist scratching?  
 (A) weight (B) flexibility (C) length (D) hardness
answer:
D


question:
The parts of plants that make seeds are the  
 (A) roots. (B) stems. (C) flowers. (D) leaves.
answer:
C


question:
Which process releases energy from digested food?  
 (A) photosynthesis (B) cellular respiration (C) vitamin production (D) fertilization
answer:

B