\"\"

\

The expression is \"\".

\

(Apply reciprocal identities: \"\")

\

\"\"

\

\"\"      (Add numerator: \"\") \ \ \"\"      (Apply reciprocal identity: \"\")\"\"

\

\"\"      (Add denominator: \"\")

\

\"\"    (Divide: \"\")

\

\"\"                        (Apply reciprocal identity: \"\")\"\"

\

Option "D" is the right answer.