Perform the Operation and Give the Answer as a Fraction $\left( - \frac { 4 } { 7 } \right) \left( - \frac { 2 } { 3 } \right)$

Multiple Choice

Perform the operation and give the answer as a fraction in lowest terms.
- $\left( - \frac { 4 } { 7 } \right) \left( - \frac { 2 } { 3 } \right)$

A) $- \frac { 4 } { 21 }$
B) $\frac { 8 } { 21 }$
C) $\frac { 7 } { 6 }$
D) $- \frac { 3 } { 5 }$