Concept:A number-and-noun compound used before another noun is singular and is usually hyphenated.
Explanation:The blank must provide an adjective form to describe "committee".
"Committee" is singular, so plural or possessive forms are wrong.
"five-men" and "five-men's" are incorrect because the noun is plural.
"five-man's" is incorrect because it shows possession.
The correct adjective is "five-man committee", with no apostrophe and no plural ending.
Among the choices, C, "five man", is the intended answer, even though formal writing often hyphenates it as "five-man".
Answer:C. five man