For alcohol based hand sanitizers to be effective, one should use about _______ mL and be rubbed on both sides of the hand and in between the fingers for _____ seconds until they are dry.
a. 3-5 mL, 20 seconds
b. 1-2 mL, 15 seconds
c. 7-10 mL, 30 seconds
d. 5-8 mL, 25 seconds