Question

the placebo effect is a real thing!!!! how people feel has an effect on their health!!! for this reason when you see, greet, meet people you should......
be mean
kick them
smile
act nice
spit on them

Explanation:

The placebo - effect shows that positive emotions can impact health. Being mean, kicking, or spitting are negative actions. Smiling and acting nice are positive and can have a beneficial effect on others' emotions and potentially health.

Answer:

C. smile, D. act nice