If a Mineral Sample Is Dated Using the Potassium- Argon

Multiple Choice

If a mineral sample is dated using the potassium- argon dating method, and if some of the argon- 40 gas has escaped, the mineral's age:

A) will appear to be younger than it really is.
B) will not be affected.
C) will appear to be older than it really is.
D) can be determined by measuring the quantity of parent material present.