Fossils Older Than ____ Cannot Be Dated by Their ¹⁴C

Multiple Choice

Fossils older than ____ cannot be dated by their ¹⁴C content because ____.​

A) ​60,000 years; most of the ¹⁴C has decayed by this time
B) ​12,000 years; half of the ¹⁴C has decayed by this time
C) ​6,000 years; older fossils do not contain carbon
D) ​2,000 years; most of the ¹⁴C has decayed by this time
E) ​500 years; half of the ¹⁴C has decayed by this time