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.

Q: Which tool is best used to collect information about the weather?  
 (A) ruler (B) stopwatch (C) thermometer (D) collecting net

A: C
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Q: Two workers are using a scaffold. One worker weighs 180 lbs. and the other weighs 200 lbs. Impact effects are assumed to increase the live load of the workers' weight by 25 percent. What is the resultant maximum live load, in pounds, that can be expected from the two workers supported by the scaffold?  
 (A) 380 lbs. (B) 475 lbs. (C) 625 lbs. (D) 950 lbs.

A: B
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Q: Erosion and weathering can both cause changes to the surface of Earth. Which of the following happens only because of erosion and NOT because of weathering?  
 (A) Rocks form deep underground. (B) Rocks become smooth and round. (C) Rocks are broken apart into small pieces. (D) Rocks are moved from one place to another.

A:
D
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