Multiply or Divide as Indicated $- \frac { 7 } { 10 } \div \frac { 7 } { 9 }$

Multiple Choice

Multiply or divide as indicated.
- $- \frac { 7 } { 10 } \div \frac { 7 } { 9 }$

A) $\frac { 9 } { 10 }$
B) $- \frac { 9 } { 10 }$
C) $\frac { 10 } { 9 }$
D) $- \frac { 49 } { 90 }$