Shown Is a Concentration Versus Time Plot for a Reaction

Shown is a concentration versus time plot for a reaction involving gases A,B,and C.
-Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10^-5 M/s.Over the same time interval what is the rate of reaction with respect to C,Δ[C]/Δt?

A) Δ[C]/Δt = Δ[A]/Δt = 3.7 × 10^-5 M/s
B) Δ[C]/Δt = (1/4) (Δ[A]/Δt) = (1/4) (3.7 × 10^-5 M/s) = 9.2 × 10^-6 M/s
C) Δ[C]/Δt = (1/2) (Δ[A]/Δt) = (1/2) (3.7 × 10^-5 M/s) = 1.8 × 10^-5 M/s
D) Δ[C]/Δt = -(1/2) (Δ[A]/Δt) = -(1/2) (3.7 × 10^-5 M/s) = -1.8 × 10^-5 M/s