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]: A student mixes vinegar and baking soda to use in a volcano model. The mixture causes the volcano model to feel cool when it is touched. What energy transformation has taken place?  
 (A) light energy changed to heat energy (B) heat energy changed to chemical energy (C) chemical energy changed to heat energy (D) chemical energy changed to light energy
[A]: B


[Q]: When a dog sees a cat, a message travels from the dog's eyes to the dog's  
 (A) brain (B) nose (C) paws (D) muscles
[A]: A


[Q]: Rhinoceroses and horses are related. They have very similar digestive systems and an odd number of toes on their feet. Horses have one toe, and rhinoceroses have three. These facts best support which claim?  
 (A) Horses and rhinoceroses share a common ancestor. (B) Horses and rhinoceroses are genetically identical. (C) Horses are the ancestors of modern rhinoceroses. (D) Horses have descended from modern rhinoceroses.
[A]:
A