Cells Adhere to Extracellular Matrix Primarily by Using Proteins That

Cells adhere to extracellular matrix primarily by using proteins that

A) are transmembrane,attaching externally to the extracellular matrix and internally to collagen.
B) span the cell membrane,attaching externally to the extracellular matrix and internally to microfilaments.
C) attach to the outside of the cell membrane and adhere primarily to the proteoglycans in the extracellular matrix.
D) attach to surface proteins on the outside of the cell and adhere primarily to collagen.
E) are secreted by the cell and contribute to the extracellular matrix.