Find the Cosine of the Acute Angle Between the Two $- \frac { 5 } { 13 }$

Multiple Choice

Find the cosine of the acute angle between the two diagonals of a rectangle with length 3 and width 2.

A) $- \frac { 5 } { 13 }$
B) 5
C) $\frac { 2 } { 13 }$
D) $\frac { \sqrt { 2 } } { 2 }$
E) $\frac { 5 } { 13 }$
F) $\frac { 5 \sqrt { 13 } } { 13 }$
G) $\frac { 2 } { 5 }$
H) $\frac { \sqrt { 3 } } { 5 }$