What is the percentage of men over 60 with at least some impairment of erectile function?
a. 3
b. 5
c. 20
d. 60
Question 2
Based on stringent criteria, research data indicate that the percentage of men between the ages of 18 and 59 with erectile dysfunction is ____ percent.
a. 1
b. 5
c. 10
d. 17