Frank Is of European Descent, and About 10 Years Ago

Frank is of European descent, and about 10 years ago he noticed his first gray hair.At first, he wasn't bothered; however, now his gray hairs are getting more numerous and his hairline has begun to recede.Based on the information provided, what is Frank's estimated age?

A) Frank is in his 20s.
B) Frank is in his 30s.
C) Frank is in his 40s.
D) Frank is in his 50s.