Circle the correct item. 1 A person ...... a vegetarian if they don't eat meat.

The correct answer is C. The sentence describes a general truth or condition, so the present simple tense is appropriate. 'A person' is third person singular, requiring 'is' or 'are'. Since 'a person' is singular, 'is' is used. However, the options provided are 'be', 'is', 'are'. For a general statement about a person, 'is' is the correct verb form. The sentence structure implies a conditional, but the options are simple verb forms. Considering the options, 'is' fits grammatically for a singular subject in the present tense. The sentence implies a definition or characteristic, making the present simple tense the most suitable. Therefore, 'is' is the correct choice to complete the sentence grammatically.