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.

Which fact about water is an example of a chemical property?  
 (A) Water expands when it freezes. (B) The boiling point of water is 100ºC. (C) Water can separate into hydrogen and oxygen. (D) The density of water is greater than the density of ice.
C

Which of these is not a benefit of microorganisms?  
 (A) They release nutrients in soil. (B) They help make antibiotics. (C) They cause food to spoil. (D) They break down waste.
C

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

C