Algebra help is needed please

which expression is equal to (3^(3/4)y^(-1/4))^4. Here, y>0
a) 27y
b) 9/y
c)27/y
d) 81y^4
e) y/27
will vote for best answer!!

c)27/y

c.

(3^(3/4)*y^(-1/4))^4 = 3^(12/4)*y(- 1) = 27/y, (e)

Right result is:

C) 27/y