Two Resistors R₁ and R₂ Are Connected in Parallel, and This

Two resistors R₁ and R₂ are connected in parallel, and this combination is connected in series with a third resistor R₃. If R₁ = 5.0 Ω, R₂ = 2.0 Ω, and R₃ = 6.0 Ω, what is the equivalent resistance of this combination?

A) 0.3 Ω
B) 3.2 Ω
C) 6.7 Ω
D) 7.4 Ω
E) 13 Ω