The four main types of tissues of animals are: muscular, which is in _____; nervous, which is in _____; epithelial, which is in _____; and connective, which is in _____.

A) the skin; cartilage; the brain; the heart
B) cartilage; the skin; the heart; the brain
C) the brain; the heart; cartilage; the skin
D) the heart; the brain; the skin; cartilage