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: On a cold, cloudy day, the local weather forecaster predicts that a high-pressure system will be moving into the area in the next 24 hours. Which weather conditions will this system most likely bring to the area?  
 (A) stormy (B) sunny (C) snowy (D) hot

SOLUTION: B

PROBLEM: Campers shouted toward a canyon wall. What characteristic of sound best explains why the campers heard an echo?  
 (A) Sound waves traveled slowly down the canyon. (B) Sound waves were absorbed by the canyon wall. (C) Sound waves reflected off the canyon wall. (D) Sound waves were refracted around the canyon.

SOLUTION: C

PROBLEM: Burning coal and natural gas are ways to produce electricity. Both coal and natural gas are nonrenewable resources. Which is an example of producing electricity using a renewable source of energy?  
 (A) using food pieces to make compost (B) gliding a boat through the water using sails (C) putting an energy-saving lightbulb in a lamp (D) heating a home with energy collected by solar panels

SOLUTION:
D