Authorities generally agree that the use of hyphens tends to defy most rules. The best advice that can be given is to consult the dictionary to determine whether a given prefix is joined solidly to a root word or is hyphenate One reliable rule, however, is that if an expression is a familiar one, such as overtime and hatchback, then it is a nonhyphenated compound.From the information provided above, it can be validly concluded that

Directions: For each question, a paragraph will be given that contains all the information necessary to infer the correct answer. Use only the information provided in the paragraph. Do not speculate or make assumptions that go beyond this information. Also, assume that all information given in the paragraph is true, even if it conflicts with some fact known to you. Only one correct answer can be validly inferred from the information contained in the paragraph.