Which sentence uses hyphens correctly? a. jane was the friend-the only friend-who offered to leah. b. mark is an out-of-work plumber. c. sarah is 20-years-old but she still lives at home. d. miko at some pizza-just one piece-for lunch.

The sentence that uses hyphens correctly is, Mark is an out-of-word plumber. The correct answer is option B. The words that are connected with hyphens in this sentence are out-of-work. Because these words are connected by hyphens, they became a compound word. A compound word consists of words that are connected by hyphens in order to create a new word with a new meaning. In this case, "out-of-word" is now a new word which functions as an adjective.