Find the Product $( w - s ) ( w - x )$

Multiple Choice

Find the product. $( w - s ) ( w - x )$

A) $w ^ { 2 } - w - w x + s x$
B) $w ^ { 2 } - w s - w x + s$
C) $w - w s - w x + s x$
D) $w ^ { 2 } - w s - w s + s x$
E) $w ^ { 2 } - w s - x + s x$