Question

hich is the correct possessive form of the compound noun mother-in-law needed to complete the sentence? My _____ birthday is in May.

A)mother’s-in-law

B)mother-in-laws

C)mother-in-laws'

D)mother-in-law’s

Answer 1

The answer IS c, it just makes common sense why it would be c.

Answer 2

Answer:

D: mother-in-law's

Explanation:

 The correct possessive form of the compound noun mother-in-law to complete the sentence is made by adding an apostrophe and an "s" to it:   mother-in-law's. Only the last word is used to show possession when it is a singular compound word. In the case of plural, as in C, only the apostrophe is added to the "s" of the last word.