For Cattell,traits are

A) relatively permanent reaction tendencies.
B) basic structural units of personality.
C) derived by the method of factor analysis.
D) all of the answers

Factor Analysis

A statistical method used to identify underlying variables, or factors, that explain the pattern of correlations within a set of observed variables.

Reaction Tendencies

refers to habitual patterns of behavior, thought, or emotional response to particular situations or stimuli.

Structural Units

Basic components or building blocks that make up a structure, system, or complex entity.