The simplified expression is (C)

To simplify the given expression, substitute the exponent operations and simplify the resulting expression.
To simplify the expression, we need to perform the exponent operations first.
Applying the power of a power property, we have:

Now, substitute this result back into the original expression:

The simplified expression is therefore (C)

The probable question may be:
Simplify: (\frac{(x^2y^3)^2}{2z} )^3
\frac{x^7y^{15}}{6z^3}
\frac{x^{12}y^{15}}{6z^3}
\frac{x^{12}y^{18}}{8z^3}
\frac{x^{7}y^{8}}{2z^3}