The demand for a commodity has unitary price elasticity. Which diagram shows how total expenditure on the commodity changes with its price?
- A[IMAGE:9708_s10_qp_12_p4_diagram_7]
- B[IMAGE:9708_s10_qp_12_p4_diagram_6]
- C[IMAGE:9708_s10_qp_12_p4_diagram_5]
- D[IMAGE:9708_s10_qp_12_p4_diagram_4]