Every verb (except has ) is OK, and this should have been obvious to you, as the plurals are clear to see. However, has should be changed to have : -------- Rule 13. Collective nouns such as team and staff may be either singular or plural depending on their use in the sentence.
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Jay_zzz0Since both 'has' and 'have' is ok for the word 'staff', I'd change 'are' to 'is' for 'a group of doctors'.