Use the Fundamental Identities to Simplify the Expression $\sin \theta = \frac { 2 \sqrt { 10 } } { 7 } , \tan \theta < 0 \quad$

Multiple Choice

Use the fundamental identities to simplify the expression.
- $\sin \theta = \frac { 2 \sqrt { 10 } } { 7 } , \tan \theta < 0 \quad$ Find $\sin ( 2 \theta )$

A) $\frac { - 12 \sqrt { 10 } } { 49 }$
B) $\frac { 31 } { 49 }$
C) $- \frac { 31 } { 49 }$
D) $\frac { 12 \sqrt { 10 } } { 49 }$