Many people who have contracted a disease called chicken pox were told by their doctors that they would never have this disease again. why?

Which of the following statements is true in regard to limited data sets

Darren was recently ticketed for speeding over 110 mph on the freeway. when the police officer stopped darren and asked him why he was going so fast, he replied that he was "king of the world." the month before this, darren felt sad and listless and had trouble getting up the energy to go to school. he probably suffers from:

Which behavior is an example of poor self esteem