How does the arrangement of the food pyramid convey its message of a healthy diet?

A. Foods at the bottom of the pyramid are larger to show that larger
portions are included in a healthy diet.
B. Foods at the top of the pyramid are larger to show that larger
portions are included in a healthy diet.
C. Foods at the bottom of the pyramid should only be a very small
portion of a healthy diet.
D. Foods in the middle of the pyramid are ones you can eat in
unlimited quantity as part of a healthy diet.