Answer:
b and c are the functions of the integumentary system.
Step-by-step explanation:
The integumentary system is the largest organ system in the body and it serves as a protective barrier between the internal organs and the external environment. It helps regulate body temperature through sweating and shivering, and it also plays a role in the production of vitamin D when exposed to sunlight. Additionally, the skin contains blood vessels that help pump blood throughout the body. These functions are essential for maintaining homeostasis and overall health.