QUESTION 15 Price level AS P1 P2 AD1 AD2 Y2 Y1 Real national output Which of the following would cause the shift AD1 to AD2 as shown in the diagram below? Tick all the answers that apply. O a. An increase in interest rates b. an increase in income taxes on consumers O c. The government allows R&D tax deduction O d. Income taxes on consumers is decreased O e. consumer expects the economy to weaken