TASK DEFINITION: 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.
PROBLEM: A radio station broadcasting across a large area is experiencing thunderstorms. How will the radio waves from the station be affected?  
 (A) wavelength will be increased (B) amplitude will be unchanged (C) frequency will be distorted (D) speed will be decreased

SOLUTION: C

PROBLEM: What is a decomposer?  
 (A) a living thing that breaks down dead organisms (B) a living thing that makes its own food (C) an animal that eats live plants (D) an animal that hunts other animals

SOLUTION: A

PROBLEM: With the development of the microscope, scientists were able to see cells for the first time. Why was it difficult to view cells without a microscope?  
 (A) Cells are small. (B) Cells are alive. (C) Cells move quickly. (D) Cells have an electrical charge.

SOLUTION:
A