Which of the following is true about skin, bones, the heart, and intestines?

A. Each of these organs is made of tissues composed of different kinds of specialized cells.

B. Skin and bone are made of tissues and cells, but the heart and intestines are not.

C. The heart and intestines are made of tissues and cells, but skin and bones are not.

D. All of these organs are made of tissues composed of the exact same type of cell.