Data from the Registrar's Office at Informed University Indicate That

Data from the registrar's office at Informed University indicate that over the past twenty years tuition and enrollment have both increased.From this information we can conclude that:

A) higher education is an exception to the law of demand.
B) the supply of education provided by IU has also increased over the twenty-year period.
C) school-age population, incomes, and preferences for education have changed over the twenty-year period.
D) IU's supply curve of education is downward sloping.