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The line segment from the origin containing the point $(-4,2)$ is rotated about the origin $\cfrac { \pi }{ 2 }$ radians.

Determine the sine of the new angle formed between the line segment from the origin that contains the new coordinate and the positive $x$-axis.

A

$-\cfrac { \sqrt { 5 } }{ 5 }$

B

$\cfrac { \sqrt { 5 } }{ 5 }$

C

$\cfrac { 2\sqrt { 5 } }{ 5 }$

D

$-\cfrac { 2\sqrt { 5 } }{ 5 }$

E

$-\cfrac { \sqrt { 5 } }{ 2 }$

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