If the Demand Curve for Bran Muffins Has Shifted Out

Multiple Choice

If the demand curve for bran muffins has shifted out due to a medical study that indicates that regular consumption of bran lowers cholesterol,then we can conclude that there has been

A) A response to the increase demand for a complementary good
B) A change in consumer tastes
C) A reduction in the production costs of bran
D) An increase in consumer expectations
E) An improvement in the economy,resulting in higher incomes