Cyclobutane, C₄H₈, Decomposes as Shown: C₄H₈(g) $\rarr$ 2 C₂H₄(g)

Cyclobutane, C₄H₈, decomposes as shown: C₄H₈(g) $\rarr$ 2 C₂H₄(g) . In a study of this reaction, the rate of consumption of C₄H₈ at a certain point was 4.50 × 10^-4 mol L^-1 s^-1. What is the rate at which C₂H₄(g) is being generated at this point?

A) 4.50 × 10^-4 mol L^-1 s^-1
B) 2.25 × 10^-4 mol L^-1 s^-1
C) 9.00 × 10^-4 mol L^-1 s^-1
D) 2.12 × 10^-4 mol L^-1 s^-1
E) 2.03 × 10^-3 mol L^-1 s^-1