Write the Following as an Algebraic Expression in U, U $\tan \left( \operatorname { arcsec } \frac { \sqrt { \mathrm { u } ^ { 2 } + 9 } } { \mathrm { u } } \right)$

Multiple Choice

Write the following as an algebraic expression in u, u > 0.
- $\tan \left( \operatorname { arcsec } \frac { \sqrt { \mathrm { u } ^ { 2 } + 9 } } { \mathrm { u } } \right)$

A) $3 u$

B) $\frac { \sqrt { u ^ { 2 } + 3 } } { u ^ { 2 } + 3 }$

C) $\frac { u \sqrt { u ^ { 2 } + 9 } } { u ^ { 2 } + 9 }$

D) $\frac { 3 } { u }$