TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: C

PROBLEM: Which of the following activities should be omitted from scientific inquiry?  
 (A) changing data to fit expected results (B) designing and carrying out investigations (C) formulating detailed hypotheses (D) communicating results to others

SOLUTION: A

PROBLEM: Which of the following will reduce a home electric bill?  
 (A) using cloth napkins rather than paper towels (B) drying clothes on a clothesline on sunny days (C) keeping appliances plugged in when not in use (D) using incandescent light bulbs in the lamps

SOLUTION:
B