But that 's getting off the subject . Eventually we were done eating and I was sitting at my computer as I heard a mad - crazy knock on the door . I open it to see Joey and Justin ! Finally !

Select from the following.
[a]. They wanted to scare them .
[b]. They wanted the door opened quickly .
[c]. They wanted to get their attention .
[d]. They were feeling impatient at the door .
Q: Why did Joey and Justin knock on their door aggressively ?
[c].