Figure 54 Shows a Downward-Sloping Linear Demand Curve

Multiple Choice

Figure 5.4 shows a downward-sloping linear demand curve. Between points b and c in the figure below, price decreases by $1, quantity demanded increases by 10, _____.​ ​
Figure 5.4

A) total revenue decreases by $1, and demand is elastic
B) total revenue decreases by $1, and demand is inelastic
C) total revenue increases by $40, and demand is elastic
D) total revenue increases by $40, and demand is inelastic
E) and total revenue increases by $80