An Archaeologist Has Found a Fossil in Which the Ratio ${ } ^ { 14 } \mathrm { C }$

Multiple Choice

An archaeologist has found a fossil in which the ratio of ${ } ^ { 14 } \mathrm { C }$ to ${ } ^ { 12 } \mathrm { C }$ is $\frac { 1 } { 9 }$ the ratio in the atmosphere. Approximately how old is the fossil? The half-life of ${ } ^ { 14 } \mathrm { C }$ is 5,730 years. Round to the nearest whole year.

A) 18,164 years
B) 18,194 years
C) 25,785 years
D) 51,570 years