Rationalize the Numerator and Simplify $\frac { \sqrt { 17 } } { 5 \mathrm { z } }$

Multiple Choice

Rationalize the numerator and simplify. Assume all variables represent positive real numbers.
- $\frac { \sqrt { 17 } } { 5 \mathrm { z } }$

A) $\frac { 17 } { 25 \mathrm { z } \sqrt { 17 } }$
B) $\frac { 17 } { 5 z \sqrt { 17 } }$
C) $\frac { 1 } { 294 }$
D) $\frac { 1 } { 5 \mathrm { z } \sqrt { 17 } }$