What Would Be the Name of the Following Cyclic Ester $\gamma$

What would be the name of the following cyclic ester?

A) ( $\gamma$ -valerolactone)
B) ( $\beta$ -butyrolactone)
C) 2-methyl- $\gamma$ -butyrolactone
D) 2-methyl- $\beta$ -butyrolactone
E) 2-methyl- $\gamma$ -valerolactone