Vector $V _ { 1 } \text { is } ( 5 i + 7 j - 3 k ) \text { and } V _ { 2 } = ( 7 i + 2 j + 14 k )$

Vector $V _ { 1 } \text { is } ( 5 i + 7 j - 3 k ) \text { and } V _ { 2 } = ( 7 i + 2 j + 14 k )$ ) . The scalar product of these two vectors is:

A) 7.0
B) 25.8
C) 2.5
D) 3.4