**The reasoning**
In British English (which JAMB, WAEC, and NECO follow), collective nouns like "team," "committee," "government," or "family" are treated as **singular** when the group acts as one unit. Here, "the team" is winning *together*, as a single entity, so we use the singular verb **"is"**.
The sentence becomes: *"The team **is** winning."*
This follows the **subject-verb agreement** rule: singular subjects take singular verbs.
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**Why the wrong options tempt you**
- **(A) are** — You might think "team = many people = plural," but grammatically, "team" is a singular collective noun.
- **(D) were** — This is past tense, but "winning" (present participle) signals we need present tense: "is winning."
- **(C) be** — This is the base form; it doesn't agree with any subject without a helping verb like "will" or "must."
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**Quick takeaway**
In exam English, treat collective nouns (team, class, crowd) as **singular** unless the sentence emphasizes individual members acting separately — then stick with "is," "has," or "was."