Which expression is equivalent to $\left(64 y^{100}\right)^{\frac{1}{2}}$?
A$8 y^{10}$
B$8 y^{50}$
C$32 y^{10}$
D$32 y^{50}$
A$8 y^{10}$
B$8 y^{50}$
C$32 y^{10}$
D$32 y^{50}$