You and Your Roommate Are Watching a Documentary on Developing

You and your roommate are watching a documentary on developing countries and your roommate notices that children in developing countries seem to be small for their ages.What would you tell your roommate about this situation?

A) The differences are just in his imagination.
B) Most children in developing countries eat a diet that is deficient in protein.
C) Most children in developing countries work so hard that they do not grow as fast as children from developed countries.
D) The diet in developing countries is primarily vegetarian.