Consider the Following Reaction
8A(g)+ 5B(g) $\to$ 8C(g)+ 6D(g)
If [C] Is Increasing at the Rate of [C]

Multiple Choice

Consider the following reaction
8A(g) + 5B(g) $\to$ 8C(g) + 6D(g)
If [C] is increasing at the rate of 4.0 mol L^-1s^-1,at what rate is [B] changing?

A) -0.40 mol L^-1s^-1
B) -2.5 mol L^-1s^-1
C) -4.0 mol L^-1s^-1
D) -6.4 mol L^-1s^-1
E) None of these choices is correct,since its rate of change must be positive.