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 is considered a property of soil?  
 (A) streak (B) fracture (C) texture (D) luster
answer:
C


question:
Genes are located on chromosomes which are composed of  
 (A) DNA. (B) RNA. (C) ATP. (D) ADP.
answer:
A


question:
The primary role of the endocrine system is to  
 (A) produce hormones that regulate body functions (B) form chemicals that destroy microbes (C) break down food to release nutrients (D) supply red blood cells to carry oxygen
answer:

A