问题
in is the largest organ of your body______of three layers; _______are essential to _____your body against diseases,poisons and the sun’s harmful rays or radiations.
A:consisting; they; protecting
B:consisting; which; protecting
C:made up of; they; protect
D:consisted; they; protecting
B:consisting; which; protecting
C:made up of; they; protect
D:consisted; they; protecting
正确答案是：
