In Example $1\mathrm{.}3,$ what economic forces explain why the real price of eggs has fallen while the real price of a college education has increased?

The real price of eggs could have fallen because

A$.$ the demand for eggs has decreased as consumers have shifted to lower$-$cholesterol foods.

B$.$ the supply of eggs has increased with improvements in egg production technology.

C$.$ the supply of eggs has increased as the cost of producing eggs has increased.

D$.$ the demand for eggs has decreased as the cost of producing eggs has decreased.

E$.$ Both A and $B$ are correct.

The real price of a college education could have risen because

A$.$ the demand for a college education has increased as more people have recognized the value of an education.

B$.$ the supply of college efucation has increased as the cost of staff salaries has decreased.

C$.$ the demand for a college education has decreased due to tastes and preferences.

D$.$ the supply of college education has increased as the cost of faculty salaries has increased.

E$.$ Both A and $B$ are correct.