In the context of organization in long-term memory, a(n) __________ is an arrangement of items into groups or classes according to common or distinct features.

A) chunk
B) hierarchy
C) echelon
D) icon

A hierarchy is a type of organization in long-term memory where items are arranged into groups or classes based on common or distinct features. This allows for efficient retrieval and storage of information as related items are grouped together in a structured manner. Chunks refer to the grouping of information in short-term memory, echelon is a military term, and icon refers to a symbol or image.