According to the ACSM, which of the following individuals would meet the threshold criteria to count cigarette use as a positive risk factor?
a. a man who smoked for 20 years but quit 2 years ago
b. a female who smoked on the weekends but quit when she got out of college 1 year ago
c. a male who smoked for 3 years but quit 2 months ago
d. a female who smoked for 30 years but quit 5 years ago