Choose the false statement.
a. all living things contain stable c-12.
b. all living things contain unstable c-14.
c. the half-life of c-14 is about 40,000 years.
d. the lower the c-14 to c-12 ratio is in a remnant of a living thing, the older it is.

C. The half-life of C-14 is about 40,000 years.

Explanation:

The only false statement from the options is that the half-life of C-14 is 40,000yrs.

The half-life of an isotope is the time it takes for half of a radioactive material to decay to half of its original amount. C-14 has an half-life of 5730yrs. This implies that during every 5730yrs, C-14 will reduce to half of its initial amount.

m=9

step-by-step explanation: