Case clustering: a. is of indeterminate significance for rare diseases, because clusters may occur by chance alone b. suggests common exposure of a group of people to an etiologic agent c. refers to spatial distribution of disease d. refers to temporal distribution of disease e. all of the above are correct

Max is a child with special needs. what is the best way his family can support max? a. place max in an institution that looks after such children b. limit his exposure to the outside world c. provide max with as normal a childhood as possible d. prevent max from mixing with other children with special needs