You are given a science question (hard-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.

[Q]: Sound is able to travel faster in solids than in air because the molecules in a solid are  
 (A) closer together than air molecules. (B) more easily moved than air molecules. (C) moving faster than air molecules. (D) larger than air molecules.
[A]: A


[Q]: Which traits would a species of nocturnal predators most likely develop over time to survive in the wild?  
 (A) a small size (B) flat, grinding teeth (C) sharp vision and hearing (D) resistance to weather changes
[A]: C


[Q]: Street maps are examples of two dimensional models. Which information cannot be determined using a basic map?  
 (A) distance from place to place (B) directions such as north and south (C) names of highways and roads (D) elevations such as distance above sea level
[A]:
D