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.

A student finds an animal in the wild. He decides it is a bird because it has  
 (A) fins. (B) scales. (C) feathers. (D) four legs.
C

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.
B

Which of the following processes is responsible for changing liquid water into water vapor?  
 (A) photosynthesis (B) condensation (C) evaporation (D) precipitation

C