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:
What procedure should be performed after any handling of a plant sample in a lab?  
 (A) applying disinfectant to the counters (B) throwing away plant material in the trash (C) washing hands with an antibacterial soap (D) placing hands under an ultraviolet light
answer:
C


question:
Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?  
 (A) chemical (B) electrical (C) thermal (D) physical
answer:
A


question:
Scientists found trilobite and brachiopod index fossils in cliffs a great distance apart from each other. What can scientists infer about the rocks in which these fossils were found?  
 (A) the age of the rock (B) the slope of the rock (C) the density of the rock (D) the weathering of the rock
answer:

A