Which sentence shows the plural possessive with cats?

• A. The cat tails were long.
• B. The cats' tails were long.
• C. The cats tail were long.
• D. The cat's tails were long.

Answer: (B)

Forming a plural possessive requires adding an apostrophe after the final s of a plural noun to show ownership by more than one item. The correct sentence uses the plural noun cats with the apostrophe after the s, making cats', then keeps tails as the plural possessed noun. This shows tails belonging to multiple cats, and the verb were agrees with the plural tail noun. The other options miss the proper possessive construction or number agreement: without the apostrophe, it doesn’t mark possession; using tail instead of tails breaks number and possession; and using cat's tails shows a singular possessor, not multiple cats.