Ans: C
$\begin{array}{rcl}
\log (-345)^{768} & = & \log 345^{768} \\
& = & 768\log 345 \\
& = & 1\ 949.045\ 065
\end{array}$
$\begin{array}{rcl}
\log 453^{-786} & = & -786 \log 453 \\
& = & -2\ 087.693\ 187
\end{array}$
$\begin{array}{rcl}
\log \left(\dfrac{1}{435}\right)^{867} & = & 867 \log \dfrac{1}{435} \\
& = & -2\ 287.570\ 186
\end{array}$
$\begin{array}{rcl}
\log \left(\dfrac{2}{543}\right)^{876} & = & 876 \log \dfrac{2}{543} \\
& = & -2\ 131.982\ 375
\end{array}$
