Factor the Polynomial by Grouping (If Possible) $3 v ^ { 2 } w - 21 v w - 3 v ^ { 2 } + 21 v$

Multiple Choice

Factor the polynomial by grouping (if possible) . $3 v ^ { 2 } w - 21 v w - 3 v ^ { 2 } + 21 v$

A) $\left( 3 v ^ { 2 } - 21 w \right) ( w - 1 )$
B) $3 v w ( v - 7 ) - 3 v ( v - 7 )$
C) $3 v ( v - 7 ) ( w - 1 )$
D) Cannot be factored