The expression
[tex]( \frac{m {}^{2} }{m {}^{ \frac{1}{3} } } ) {}^{ \frac{ -1}{2} } [/tex]
is equivalent to

a.
[tex] - \sqrt[6]{m5} [/tex]

b.
[tex] \frac{1}{ \sqrt[6]{m {}^{5} } } [/tex]

c.
[tex] - m \sqrt[5]{m} [/tex]

d.
[tex] \frac{1}{m \sqrt[5]{m} } [/tex]