instruction:
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.
question:
As water cools to a temperature of zero degrees Celsius and forms ice, water molecules tend to  
 (A) move farther apart. (B) vibrate rapidly. (C) flow more randomly. (D) gradually expand.
answer:
A


question:
For a technology project, Kyle came up with an idea to build a model bridge. He wants his bridge to span 50 cm and to support a 1 kg object. According to the engineering design process, which of the following should be Kyle's next step?  
 (A) construct prototypes of different kinds of bridges (B) research the different designs of bridges (C) gather the materials needed to build the bridge (D) make a drawing to show how to build the bridge
answer:
B


question:
Scientists frequently monitor levels of microorganisms at beaches in the summer time. High temperatures, pollution, runoff, and illegal dumping all affect water quality. What do these scientific efforts illustrate?  
 (A) Pollution can be eliminated through water testing. (B) High temperatures increase runoff from agricultural fields. (C) Water testing identifies origination of illegal dumping. (D) Monitoring water quality is important to public health.
answer:

D