Answer:
That is a good question I was wondering the same thing.
Explanation:
Number 1 is c number 2 is A this is a lot but it’s very easy you just got to put the right word in the blank
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".