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

How to make your life good
Smile at those around you.
It's often been said that a smile is contagious, and research suggests that's true. Studies suggest that friendly engagement with others boosts happiness levels, at least in part because people are more likely to treat a smiling person better than a non-smiling person.

OPTIONS:
[1]. Try to boost your self esteem by smiling more when you're around other people. This may be temporary or overnight, but it can help you positively feel better..
[2]. Smiling or laughing in a positive manner also increases your chances of appearing positive. Keep in mind that although you may act like someone you're not, you are telling yourself " no..
[3]. A good smile will also provide you with a boost of confidence and increase your physical attraction to people! Even if you feel nervous and hesitant to smile, try it again. It's likely you're not doing so wrong..
[4]. A smiling person is more likely to be regarded as viewed as attractive, reliable, relaxed and sincere. Cheering yourself up by cheering others is a hallmark of how to have a good life..
[4].