Read the following article and answer the question by choosing from the options.

I start looking for the screaming woman and finally figure out it 's coming from an apartment at the end . All the other neighbors are hiding behind their doors and the woman screaming is in the upstairs apartment . I go up there and knock . I yelled if everything was okay , if she needed the police .

Why did the narrator knock at the door ?
Select from:
[I] None of the above choices .
[II] To see if the woman was home .
[III] To see if the apartment was clean .
[IV] To see if the woman needed help ....A:
[IV]