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 most likely a genetic adaptation of desert plants to survive the hot, dry climate conditions?  
 (A) thin bark (B) waxy leaves (C) leaves that remain all year (D) flowers that bloom all year
answer:
B


question:
While conducting an experiment on gravity, what will be needed to ensure the safety of students?  
 (A) quiet zones (B) drop zones (C) heavy objects (D) frictionless surfaces
answer:
B


question:
Which of the following provides the best evidence that Earth has evolved over geologic time?  
 (A) coral reefs that slowly changed size (B) desert sand dunes that were shaped by winds (C) deposits of sediment found at the mouth of a river (D) rock containing fossilized seashells found on a mountaintop
answer:

D