Three resistors are placed in series. They have the following resistances: R₁ = 20.0 ohms, R₂ = 20.0 ohms, R₃ = 10.0 ohms. What current would be moved through this circuit by a 5.0 -V power supply?
a) 0.10 A
b) 0.15 A
c) 0.20 A
d) 0.25 A