Find || a || $\| a \| = \sqrt { 7 }$

Multiple Choice

Find || a ||. a = - < 2, - 5 >

A) $\| a \| = \sqrt { 7 }$
B) $\| a \| = \sqrt { 29 }$
C) $\| a \| = \sqrt { 5 }$
D) $\| a \| = \sqrt { 28 }$
E) $\| a \| = \sqrt { 50 }$