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.
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Question: Scientists found fish fossils in the desert. What do the fossils tell about this environment when the fish were alive?
(A) There was a forest with large trees. (B) There were lakes with water plants. (C) There were mountains with glaciers. (D) There was a desert with large rocks.

Answer: B

Question: In 1971, the bones of an extinct flying dinosaur were discovered. This kind of discovery helps everyone learn more about
(A) impact of humans on Earth. (B) effect of gravity on animals. (C) history of animal species on Earth. (D) likelihood that dinosaurs will reappear.

Answer: C

Question: At an archaeological dig site, scientists, volunteers, and students collect items used by people living hundreds of years ago. To determine the history of the different people who may have lived at the site, which is the best method to classify the recovered items?
(A) by the type of item (B) by the size of the item (C) by the person who located the item (D) by the soil layer where the item was found

Answer:
D