A General Reaction Written as 2A + 2B $\rightarrow$ C + 2D Is Studied and Yields the Following Data

A general reaction written as 2A + 2B $\rightarrow$ C + 2D is studied and yields the following data.
-For the first of the reactions in the table of data, determine - $\Delta$ [B]/ $\Delta$ t.

A) 8.00* 10^-5
B) 1.60*10^-4
C) 4.00 *10^-5
D) 2.00 *10^-5
E) none of these