Assume That Y Is Normally Distributed $N \left( \mu , \sigma ^ { 2 } \right)$

Assume that Y is normally distributed $N \left( \mu , \sigma ^ { 2 } \right)$ To find $\operatorname { Pr } \left( c _ { 1 } \leq Y \leq c _ { 2 } \right)$ where $c _ { 1 } < c _ { 2 }$ and $d _ { i } = \frac { c _ { i } - \mu } { \sigma }$ , you need to calculate $\operatorname { Pr } \left( d _ { 1 } \leq Z \leq d _ { 2 } \right) =$

A) $\Phi \left( d _ { 2 } \right) - \Phi \left( d _ { 1 } \right)$
B) $\Phi ( 1.96 ) - \Phi ( - 1.96 )$
C) $\Phi \left( d _ { 2 } \right) - \left( 1 - \Phi \left( d _ { 1 } \right) \right)$
D) $1 - \left( \Phi \left( d _ { 2 } \right) - \Phi \left( d _ { 1 } \right) \right)$