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]: Anna's class counted the number of butterflies in the school garden for an assignment. Anna's results were different from the rest of the class. What should she do?  
 (A) Change the assignment. (B) Leave the results alone. (C) Match her results with the class. (D) Ask the teacher to count for her.
[A]: B


[Q]: A cupful of water and a similar cupful of gasoline were placed on a table near a window on a hot sunny day. A few hours later it was observed that both the cups had less liquid in them but that there was less gasoline left than water. What does this experiment show?  
 (A) All liquids evaporate. (B) Gasoline gets hotter than water. (C) Some liquids evaporate faster than others. (D) Liquids will only evaporate in sunshine. (E) Water gets hotter than gasoline
[A]: C


[Q]: As water starts to freeze, the molecules of water  
 (A) gain thermal energy. (B) move more freely. (C) increase in size. (D) decrease in speed.
[A]:
D