Question

What is the main function of the circulatory system in multicellular organisms? A. to bring oxygen into the lung B. to put carbon dioxide into all blood vessels C. to expel waste products from the body D. to transport materials throughout the body

Answer 1

your answer is D. to transport materials throughout the body 

Answer 2

Answer: sorrry for answeing late but the answer is D: to transport materials throughout the body

Explanation: i did the test!