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: Large amounts of industrial gases are released into the atmosphere every day. What happens to those gases?
(A) They are broken down by ultraviolet light from the Sun. (B) They are converted into nitrogen and oxygen. (C) They rise through the atmosphere and go into outer space. (D) They remain in the atmosphere for long periods of time.

Answer: D

Question: The yellow-throated longclaw is a bird that lives on the dry savanna of Africa. It looks almost exactly like another bird, the western meadowlark of North America. Although the birds look very similar, they are not even in the same taxonomic family. Scientists think the birds look alike because the two species developed under similar environmental pressures, even though they developed thousands of miles apart. Which process does their development demonstrate?
(A) sexual selection (B) disruptive selection (C) divergent evolution (D) convergent evolution

Answer: D

Question: Which objects are the most useful for collecting data on the speed of a toy car?
(A) microscope, computer, ruler (B) thermometer, calculator, magnet (C) stopwatch, calculator, meter stick (D) camera, digital recorder, safety goggles

Answer:
C