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: Carolina uses a microscope to view a soil sample taken from her backyard. Which part of the soil would she ONLY be able to see with a microscope?  
 (A) bacteria (B) grass (C) rainwater (D) rocks

Answer: A


Question: Which of these is an inherited behavior?  
 (A) a seal balancing a ball (B) a dog getting the newspaper (C) a spider spinning a web (D) an ape using sign language

Answer: C


Question: Which two human body systems are most responsible for getting oxygen to cells?  
 (A) digestive and skeletal (B) skeletal and circulatory (C) circulatory and respiratory (D) respiratory and digestive

Answer:
C