I killed the mood by saying , " Fine I 'll get knocked up right now ! " It 's pretty funny , though . My mom said she and dad would react the same way Juno 's parents would have . They would have calmly helped me out and they would ' ve let me keep my baby too .

Pick from:
[I] She wants to have a baby .;
[II] She is already pregnant .;
[III] None of the above choices .;
[IV] It was a joke .;
Answer the following question: Why did the narrator say she 'll get knocked up right now ?
[IV]