Petroleum Is a Fossil Fuel Containing Many Different Carbon Compounds

Multiple Choice

Petroleum is a fossil fuel containing many different carbon compounds. If the carbon atoms in petroleum have been in the ground for 100 million years, what fraction of the initial ¹⁴C atoms is still there? (t_1/2 = 5,370 yr)

A) 0
B) 1 * 10^-10
C) 5.7 * 10^-5
D) 1.0 * 10^-3
E) 5.7 * 10^-1