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.

What form of energy is being used when a person pushes a wooden block across the floor?  
 (A) mechanical (B) magnetic (C) sound (D) electrical
A

Which would be the best method to use to dispose of cardboard boxes not utilized by a local grocery store?  
 (A) burn them once a month (B) send them to be dumped in a remote area (C) have them recycled for future paper products (D) put them into a dumpster with the rest of the trash
C

Sea lions often swim in the waters of the Pacific Ocean with their flippers sticking above the surface of the water. At other times they may be on land with only their flippers in the water. What would these behaviors most likely accomplish?  
 (A) attracting mates (B) confusing predators (C) preventing dehydration (D) regulating body temperature

D