Which is best used for multiple regression?

Hippocrates is viewed as one of the first figures in history to emphasize that psychopathology can be attributed to

a. supernatural causes. b. the influence of culture. c. natural causes. d. unconscious mental processes.

Adam is playful yet moody, fussy yet tolerant, quiet at times yet boisterous. His temperament would be classified as

easy. slow-to-warm. difficult. hard to classify.