Which statement best describes connective tissue?

A) usually lines a body cavity
B) primarily functions in secretion
C) always arranged in a single layer of cells.
D) usually contains a large amount of matrix

Connective tissue is characterized by having a large amount of extracellular matrix, which is composed of various fibers and ground substance. This matrix separates and supports the cells within the tissue. Connective tissue does not usually line body cavities, nor does it primarily function in secretion. Additionally, connective tissue may be arranged in multiple layers, rather than a single layer of cells.