Backward linkages are the demands created by new supply capacities

Which of the following shifts the aggregate demand curve rightward?

A) a decrease in government expenditure B) expectations that future incomes will fall C) a decrease in the quantity of money and an increase in interest rates D) a tax cut

Which of the following is(are) the characteristics of a bubble

a. Bubbles emerge when investors disagree about the particular economic importance of an event b. Bubbles involve very large increases in trading volume c. Bubbles may continue even when many expect a bubble and doesn't pop until a sufficient number of skeptical investors act simultaneously d. All of the above