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.

[EX Q]: A student was taking notes while the teacher was discussing cells. Which of these is a statement that the teacher most likely made?  
 (A) Most cells have the same shape. (B) The shape of a cell depends upon its function. (C) Cells that carry information are round and disk-shaped. (D) Blood cells that move through the body are long and thread-like.
[EX A]: B

[EX Q]: A student walking quickly while carrying an orange on his lunch tray stops suddenly. The orange will most likely roll off the tray due to  
 (A) inertia of the orange. (B) centripetal force of the orange. (C) the friction acting on the orange. (D) the balanced forces acting on the orange.
[EX A]: A

[EX Q]: Volcanic eruptions are caused primarily by the movement of  
 (A) rock by erosion (B) Earth in its orbit (C) planetary winds (D) tectonic plates
[EX A]:
D