Use the Given Triangles to Evaluate the Expression $\sec 45 ^ { \circ }$

Multiple Choice

Use the given triangles to evaluate the expression. Rationalize all denominators.
- $\sec 45 ^ { \circ }$

A) $\sqrt { 2 }$
B) $\frac { \sqrt { 2 } } { 2 }$
C) $\frac { 2 \sqrt { 3 } } { 3 }$
D) $\sqrt { 3 }$