In which sentence does the verb agree with the subject?

a.
the orchestra performs after this dance routine.

b.
a flock of ducks were flying toward the lake.

c.
the group lift the heavy box onto the truck.

The sentence in which the verb agrees with the subject is: The orchestra performs after this dance routine. The correct answer is option A. The subject of the sentence is the word "orchestra". This is an example of a collective noun, meaning, a group of musicians playing together. Since it is labeled as a group and only one group is mentioned in the sentence, then it should take the singular form of the verb which is "performs".

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