Concept:Subject-verb agreement: the verb must agree with the main subject, not with words in an intervening phrase.
Explanation:The main subject is "The coach", which is singular.
The phrase "as well as the players" is an addition and does not change the number of the subject.
Since the sentence refers to "last month", the verb must be in the past tense.
A singular subject in the past tense takes "was".
Thus, the correct completion is: "The coach, as well as the players, was given fantastic gifts last month."
Answer:A. was