Which type of psychotomimetic is a nonhuman LEAST likely going to self-administer if given the opportunity?

Which is most costly to society?

disability mortality morbidity vitality

The survey method of research involves ______

a. an intensive description and analysis of a single individual or a group of individuals b. asking predetermined questions of a carefully selected group of people through interviews or questionnaires c. studying the naturally occurring relationship between d. unobtrusively observing people engaging in normal behavior in their natural environment