A branch circuit that supplies 4 receptacles originates in a 120/240-volt 10, 3-wire panelboard. The
12 AWG circuit conductors are
connected to a 20-A circuit breaker. The receptacles are permitted to
be rated
I. 20 amperes
a. I only
II. 15 amperes
b. II only
c. either I or II
d. neither I nor II