Select the sentence that uses possessive forms correctly.
a. In the play, I wore my mothers wig and my grandmothers shoes, but my two sisters clothes were too modern for the part. b. In the play, I wore my mother's wig and my grandmother's shoes, but my two sisters' clothes were too modern for the part.
c. In the play, I wore my mothers' wig and my grandmothers' shoes, but my two sister's clothes were too modern for the part.
d. In the play, I wore my mother's wig and my grandmother's shoes, but my two sisters' clothes were too modern for the part. -uses possessive forms correctly.