After serving as a substitute for $3$ weeks on Andrew's team, Nancy realized that she liked the new work much more than the work on her original team. Although her formal training is in her original team's field, she put in a request to move to Andrew's team. After learning that her request was rejected, Nancy concluded that she must have done poor quality work for Andrew's team.

Which of the following statements, if true, would most strongly support Nancy's conclusion?

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The person Nancy was substituting for has returned to Andrew's team.

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Andrew found some mistakes in a report that Nancy prepared.

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Nancy is the only person on her original team who has some of the skills required to complete its work.

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Andrew's team is not allowed to add any new members at this time.

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The position on Andrew's team officially requires a degree relevant to the work.