The simplified Sum of Product form of the following Boolean expression $$(P+\overline{Q}+\overline{R})(P+Q+R)(P+Q+\overline{R})$$

A

$$(\overline{P}  Q+R)$$

B

$$( P +Q \overline{R} )$$

C

$$( P \overline{Q} + R)$$

D

$$( PQ+ R)$$