instruction:
You are given a science question (hard-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:
In which way is any single observation of wind speed best described?  
 (A) It is an indication of a future weather condition. (B) It is an indication of the amount of humidity. (C) It is an indication of weather at a specific time. (D) It is an indication of the existing climate.
answer:
C


question:
Tanya investigates which household objects are attracted to magnets. Which will help her make a conclusion?  
 (A) a prediction (B) a hypothesis (C) a list of supplies (D) a table of results
answer:
D


question:
Beach pollution includes sewage, paper and plastic containers, and oil from boats. Which beach activity most likely increases beach pollution?  
 (A) watching birds (B) collecting seashells (C) eating a picnic lunch (D) building a sand castle
answer:

C