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.

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.

A: A
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Q: Auroras occur where Earth's magnetosphere traps high-energy particles in which region of the atmosphere?
(A) troposphere (B) stratosphere (C) thermosphere (D) exosphere

A: C
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Q: What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?
(A) very high melting point (B) gas state at room temperature (C) good conductor of electric current (D) extremely brittle solid at room temperature

A:
B
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