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 are produced in both the male and female reproductive systems in humans?  
 (A) sperm (B) nutrients (C) fertilized eggs (D) sex cells

Answer: D


Question: Skunks spray a strong-smelling liquid to ___.  
 (A) get rid of wastes (B) attract prey (C) defend themselves (D) help nearby plants grow

Answer: C


Question: Many areas of Massachusetts have small deep ponds called kettle ponds. Which of the following best explains the formation of these ponds?  
 (A) avalanche (B) wind erosion (C) glacial depression (D) sediment deposition

Answer:
C