Price Elasticity - Demand Curve

35. If consumers have budgeted a fixed amount of money to buy a certain commodity, and within a certain range of prices will spend neither more nor less than this amount on it, then their demand curve in this price range would be properly designated as:
A) in equilibrium.
B) perfectly price elastic.
C) perfectly price inelastic.
D) highly price inelastic but not perfectly so.
E) unitary price elastic.