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.

During which season of the year would a rabbit's fur be thickest?  
 (A) fall (B) spring (C) summer (D) winter
D

Often organisms seem similar in their outward appearances. For example, a porpoise and a shark seem closely related, but they are not. Such similarity is the result of  
 (A) convergent evolution. (B) adaptive radiation. (C) artificial selection. (D) genetic equilibrium.
A

As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?   
 (A) discovering new reservoirs of water in the aquifer (B) reducing water usage through conservation measures (C) combining hydrogen with oxygen to make water (D) piping in water from an aquifer elsewhere

B