To Determine the Age of Fairly Recent Fossils and Organic

To determine the age of fairly recent fossils and organic artifacts,it is possible to analyze the amounts of the isotopes ¹⁴C and ¹⁴N,because over time the ¹⁴C-which originated in the atmosphere-breaks down into ¹⁴N through a process known as beta decay.What net change occurred for this to happen?

A) The ¹⁴C lost an electron.
B) The ¹⁴C gained an electron.
C) The ¹⁴C lost a proton.
D) The ¹⁴C gained a proton.
E) The ¹⁴C gained a neutron.