What is a genetic mutation?

A. The process of decreasing chromosomes numbers to half of what the parent cell has
B. The copying of DNA to form identical daughter cells
C. A permanent change in an organisms genetic code
D. a fusion of egg and sperm cell to produce a new individual
Is the answer A?
Thanks a bunches ;)

2 answers

No.

http://ghr.nlm.nih.gov/handbook/mutationsanddisorders/genemutation
C is correct.