. Jariah and her friends, Celeste and Gaby, are on a thrilling adventure exploring the mysteries of the human body. They stumble upon a fascinating type of involuntary muscle that works tirelessly in the walls of internal organs, like the digestive tract and blood vessels. Can you help them identify what this amazing muscle is called?

A. Skeletal muscle

B. Cardiac muscle

C. Visceral (smooth) muscle

D. Muscular system