For all real values of $p$ and $r$, which of the following expressions is equivalent to $p(2-r)+8(p-r)$ ?

$6p-9r$

$6p-8r$

$6p-8r-pr$

$10p-2r$

$10p-8r-pr$

Approach

$$ p(2-r)+8(p-r) $$ $$ =2p-pr +8p-8r $$ $$ =\boxed{10p-8r-pr} $$