Find $| \mathrm { v } |$ And $| \mathbf { u } + \mathbf { v } |$

Multiple Choice

Find $| \mathrm { v } |$ and $| \mathbf { u } + \mathbf { v } |$
, given that $\mathbf { u } = - \mathbf { j }$
And $\mathbf { v } = \mathbf { i }$

A) $| \mathrm { v } | = 1$
, $| \mathbf { u } + \mathrm { v } | = \sqrt { 2 }$
B) $| v | = - 1$
, $| \mathbf { u } + \mathbf { v } | = - \sqrt { 2 }$
C) $| \mathrm { v } | = \sqrt { 2 }$
, $| \mathbf { u } + \mathbf { y } | = 1$
D) $| \mathrm { v } | = \sqrt { 2 }$
, $| \mathbf { u } + \mathrm { v } | = \sqrt { 2 }$
E) none