Final answer:
The correct statement is that merocrine glands release their secretion by pinching off part of the cell.
Step-by-step explanation:
The correct statement regarding multicellular exocrine glands is D) Merocrine glands release their secretion by pinching off part of the cell.
Merocrine glands are a type of exocrine glands that secrete their products by exocytosis. The secretions are enclosed in vesicles that move to the apical surface of the cell where the contents are released. This is different from holocrine glands, which store their secretions until they rupture and release their contents, and apocrine glands, which release secretions by pinching off the apical portion of the cell.