Studies Show That as Real Income Has Been Rising in the United

Studies show that as real income has been rising in the United States,the per-capita demand for food has been increasing by

A) much less,which means the demand for food is income inelastic.
B) much more,which means the demand for food is income elastic.
C) much more,which means the demand for food is income inelastic.
D) as much,which means the demand for food is unit elastic.
E) none of the above