making subjects and verbs agree using collective nouns.

1. The Advertising Council of Springfeild(is / are) sponsoring a student poster contest with cash prizes.

Is "Council" singular or plural?

Advertising Council is singular so it needs a singular verb -- is.

To determine whether to use the singular verb "is" or the plural verb "are" in this sentence, we need to consider the subject and its verb agreement.

In this case, the subject is "The Advertising Council of Springfield," which is a collective noun. Collective nouns refer to a group of people or things as a single unit.

To decide whether to use a singular or plural verb, consider whether you are talking about the group as a whole (singular) or the individuals within the group (plural).

In this sentence, we are talking about the group as a whole, the Advertising Council. Therefore, we need to use the singular verb "is."

So, the correct sentence is: "The Advertising Council of Springfield is sponsoring a student poster contest with cash prizes."