Which one is correct?
A. You should decide which one of the three choices A, B, or C best answer the question.
B. You should decide which one of the three choices A, B, or C best answering the question.
C. You should decide which one of the three choices A, B, or C best answers the question.
D. You should decide which one of the three choices A, B, or C best are answer the question.

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Personal PronounsIntermediate GrammarTenses and FoodLanguage Features: Reflective ArticleCardiology ServicesGerunds/InfinitivesAdjective / Noun + to InfinitivePronouns and QuantifiersTime ExpressionsThe Past SimpleOther quiz:
Will vs Verb Infinitives › ViewOrder the sentence:
do / to / What / to / you / do / ?
A. What to do you plan to?
B. What you to do to plan?
C. What do you plan to do?
D. Do you plan to do what?
Adjective and Adverb › View
………………., He passed the tests
A. Luckily
B. lucky
C. Unluckily
D. Unlucky
Grammar › ViewWhen you (arrive) at the party, who (be) there?
A. arrived / was being
B. arrived / was
Grammar › View
You’re coming to the party,
A. aren’t you?
B. isn’t you?
C. are you?