Question $4(1$ point$)$

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Consider the following reaction

$8A(g)+5B(g)8C(g)+6D(g)$

If $C$ is increasing at the rate of $4\mathrm{.}0mol{L}^{-1}{s}^{-1},$ at what rate is $B$ changing?

a$)-0\mathrm{.}40mol{L}^{-1}{s}^{-1}$

b$)-4\mathrm{.}0mol{L}^{-1}{s}^{-1}$

c$)-6\mathrm{.}4mol{L}^{-1}{s}^{-1}$

d$)-2\mathrm{.}5mol{L}^{-1}{s}^{-1}$