What is the primary difference between trait and type theorists in personality psychology?

A. Trait theorists believe people are categorically different, while type theorists believe people vary along a continuum.
B. Trait theorists believe people vary along a continuum, while type theorists believe people are categorically different.
C. Trait theorists focus on genetic influences, while type theorists focus on environmental factors.
D. Trait theorists use self-report questionnaires, while type theorists use projective tests.