A bar graph of the radioactive decay of carbon-14 is shown below. Carbon-14 decays to Nitrogen-14. The solid black sections of the bars on the graph represent the percentages of _.

(A) carbon-14 from the original sample that has not decayed
(B) uranium-238 from the original sample that has not decayed
(C) nitrogen-14 decay product resulting from the radioactive decay
(D) lead-206 decay product resulting from the radioactive decay