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:
All of the following can become fossils except  
 (A) bones. (B) shells. (C) teeth. (D) rocks.
answer:
D


question:
People are developing electric cars that would replace gasoline-burning cars. One major advantage of the electric car is that it  
 (A) accelerates faster. (B) causes less pollution. (C) gives a smoother ride. (D) needs no battery.
answer:
B


question:
Which event will occur in an area after a major flood?  
 (A) a decrease in the erosion of riverbanks (B) a decrease in the number of native plants (C) an increase in the number of animal habitats (D) an increase in the diversity of insect species
answer:

B