This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to approach the guy you like
Make sure he knows who you are.
This is easy if you are already lab partners in science class or you work together in the same office. However, you may have a crush on a guy whom you've never actually talked to.

Available choices: (1). Try saying something encouraging like, " hey, my significant other passed away two months ago. Are you having a good time? " Be comfortable talking to the person to impress him.; (2). Put your hand on his shoulder or waist if you want to get close to him, or subtly rub his arm. If you're a bit uncomfortable initiating intimate contact, take a breather to breathe some air.; (3). Make sure you try to make sure your crush knows who you are before you approach him. Ask him out for a date, if that's what he wants.; (4). If this is the case, there are several ways you can let him know who you are without seeming like you're stalking him. If you have mutual friends, have one of them introduce you.;
The answer is:
(4).