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.

Which is an example of an organism that has been selectively bred for a particular genetic trait?
(A) cats that eat mice (B) cows that graze on grass (C) pigs that form large herds (D) chickens that lay large eggs
D

What has occurred when bubbles form in a liquid that is being heated?
(A) Oxygen is absorbed from the air. (B) Heat is radiating in the liquid. (C) The boiling point has been reached. (D) Molecular stability in the liquid is increasing.
C

Between 40 and 50 million years ago, the landmass on the Indian plate collided with the landmass on the Eurasian plate. What formed when these landmasses collided?
(A) the Grand Canyon (B) the Great Plains (C) the Himalayan Mountains (D) the Mariana Trench
C