Write the Expression with Only Positive Exponents and Evaluate If $$\frac { \frac { 1 } { a } + 1 } { \frac { 1 } { a } - 1 }$$

Multiple Choice

Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real
numbers.
- $$\frac { \frac { 1 } { a } + 1 } { \frac { 1 } { a } - 1 }$$

A) 1
B) $\frac { 1 + a } { 1 - a }$
C) $1 - a ^ { 2 }$
D) $\frac { a } { 1 - a ^ { 2 } }$