Multi-choice problem: Continue writing the next sentence in this paragraph:

How to tell if a girl has a crush on you
Try to catch her staring at you.
This one is a giveaway. If you look across the room in class or at a party and catch her looking right at you, then she may have a crush on you.

OPT:
(I) Observe how she interacts with other people. If she lowers her head when talking to another person, then she may have a crush on you..
(II) Occasionally, give her a small, slow smile so that she is sure that you aren't staring at her. If you don't know how to catch a girl's look, click on " hey..
(III) If she sees that you've noticed her staring and looks away and blushes, or gives you a little smile, then she may be acknowledging that she may like you. Just don't be too obvious about trying to catch her staring at you, or she may think that you're the one staring at her..
(IV) Hold your eye contact for at least a few seconds. Studies show that the pupils are much bigger and more dilated when someone holds eye contact for more than a few seconds..
(III)