Which of the following represents a CNF$?$

A$.($p

$$ q$)$

$($r

$$ s$)$

B$.($p

$$ q$)$

$($r

$$ s$)$

C$.($p

$$ q$)$

$($r

$$ s$)$

D$.($p

$$ q$)$

$($r

$$ s$)$