One advantage of Holland's theory of career development is that it provides six personality types so that everyone can easily determine which type best describes them and what careers would be appropriate for them

The mean is the

A. 45th percentile B. most commonly occurring score C. arithmetic average D. variability of scores

Which of the following best describes the classification of medicinal substance use?

a. trying a substance once or perhaps a few times out of curiosity and then not using it again b. the use of a substance during social activities with one or more friends c. using a substance to relieve an unpleasant emotional state such as sadness, anxiety, stress, or loneliness d. when a person has become dependent on regular use of the substance to feel good physically or psychologically