The Average Rate of Disappearance of I in the Initial

The average rate of disappearance of I in the initial 400 s is _ M/s.

A) 3.8 × 10^{- 5}
B) 3.2 × 10^{- 4}
C) 1.4 × 10^{- 4}
D) 2.7 × 10⁴
E) 6.00