What number should be multiplied by $(-8)^{-1}$ so that the product may be equal to $(10)^{-1}$

Question

$( A ) \large\frac{-6}{5} \\ ( B ) \large\frac{4}{5} \\ ( C ) \large\frac{-4}{5} \\ ( D ) \large\frac{1}{5}$