______________ is classified as a content theory.

A) ERG theory
B) Expectancy theory
C) Goal-setting theory
D) Equity theory
E) Probability theory

ERG theory, proposed by Clayton Alderfer, is classified as a content theory of motivation. This theory suggests that an individual's needs can be categorized into three groups: Existence needs (E), Relatedness needs (R), and Growth needs (G). The theory proposes that an individual seeks to satisfy all these needs simultaneously, and if one need is not met, they may shift their focus to another need category.