This one: "Lee noticed a problem and alerts a teacher".
The second verb should not have been changed to present tense.
You should change the verb alert to past tense: "Lee noticed a problem and alerted a teacher".
It’s definitely A, because I’ve done that question before
Explanation:
introduction on most exciting day of school
No it's not correct because pride in herself in bieng herself doesn't make sence
The concert promoters already sold all the tickets to the shows.