For the Following Reaction: 2 N₂O₅ (G) $\rightarrow$ 4 NO₂ (G) + O₂ (G) the Initial Rate of (G)

For the following reaction: 2 N₂O₅ (g) $\rightarrow$ 4 NO₂ (g) + O₂ (g) the initial rate of formation of O₂ was found to be 1.25 × 10^-4 mol dm^-3 s^-1. What is the initial rate of consumption of N₂O₅?

A) 2.50 × 10^-4 mol dm^-3 s^-1.
B) 1.25 × 10^-4 mol dm^-3 s^-1.
C) 3.75 × 10^-4 mol dm^-3 s^-1.
D) 5.00 × 10^-4 mol dm^-3 s^-1.