An Old Piece of Dead Wood Contains 38% of the ¹⁴C

An old piece of dead wood contains 38% of the ¹⁴C abundance of a living sample.How old is it? (The half-life of ¹⁴C is 5730 years.)

A) 3.95 $\times$ 10³ years
B) 8.78 $\times$ 10³ years
C) 8.00 $\times$ 10³ years
D) 7.66 $\times$ 10³ years
E) 3.47 $\times$ 10³ years