Question

Which sentence contains an error in the use of hyphens? A. Her dad is pretty strict; he's an ex-marine. B. I could only run for a quarter-mile this morning. C. Kelly had a half-hour session with the physical therapist yesterday.

Answer 1

Your answer is C. Kelly had a half-hour session with the physical therapist yesterday.

Answer 2

"C. Kelly had a half-hour session with the physical therapist yesterday" is the sentence that contains an error. Half hour needs not be hyphenated. It is simply two words.