From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences.
__________ are often quite caring.
- mother-in-law
- mother-in-laws
- mothers-in-laws
-
mothers-in-law
The correct answer is: D
Explanation
Forming plurals for hyphenated compound nouns requires the addition of 's' to the principal word.
''Mother'' is the principal word.