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".
As you know, this story reveals the problem of men's attitude towards women, especially this conflict shapes in relationships between husbands and their wives. So, at those times only a few men took women serious, mostly they were neglectful to women and didn't treat them like they were on a par. Even though you didn't give any options, I have got the answer and do hope it will help you: The shattered fruit jar symbolizes the broken and unhappy home in which Mrs. Wright lived.
Answer:
I believe that would be an independant clause. Hope that helps!