Find (A) the Dot Product of the Two Vectors and (B)

Multiple Choice

Find (a) the dot product of the two vectors and (b) the angle between the two vectors. $5 i$ and $4 j$

A) $0,0 ^ { \circ } 0 ^ { \prime }$
B) $\text { 20, } 0 ^ { \circ } 0 ^ { \prime }$
C) $1,180 ^ { \circ } 0 ^ { \prime }$
D) $0,180 ^ { \circ } 0 ^ { \prime }$
E) $20,180 ^ { \circ } 0 ^ { \prime }$