Consider the Following Reaction 8A(g) + 5B(g)  8C(g)

Multiple Choice

Consider the following reaction 8A(g) + 5B(g)  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 the above, since its rate of change must be positive