Final answer:
The subject of this question is English, and the grade level is High School. The subject of the sentence is the report and the presentation, and the correct verb form should be 'were well prepared.' The management team is an additional detail and does not affect the subject-verb agreement.
Step-by-step explanation:
In this sentence, the subject is the report and the presentation.
The verb should agree with both subjects, so the correct form is 'were well prepared' instead of 'was well prepared.'
The management team should be treated as an additional detail in the sentence and doesn't affect the subject-verb agreement.