[Solved] What Is the Source of Natural Carbon-14?

Question 46
Multiple Choice

What is the source of natural carbon-14?

A)nuclear fission of the heavy, radioactive elements uranium and thorium
B)fusion of hydrogen and helium in the Sun and eruption of solar flares
C)leakage of radioactive gases from the liquid, outer core
D)cosmic ray collisions triggering "neutron-capture" in ordinary atmospheric nitrogen

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