Choose the Rational Number That Is Between the Given Fractions $\frac { -1 } { 6 }$

Multiple Choice

Choose the rational number that is between the given fractions.
- $\frac { -1 } { 6 }$ and $\frac { 1 } { 7 }$

A) $- \frac { 4 } { 21 }$
B) $- \frac { 19 } { 84 }$
C) $\frac { 5 } { 42 }$
D) $\frac { 4 } { 21 }$