[单选题]
For a straight-line demanz/ 62tun2ki0 oulc si*d curve, which of the following will ocq51v g-2(gf r).3msqkxzwrgncur when the priceg xz fwq- (ggm)q53rv.nk1r2 s is lowered?
A. The total revenue decreases.
B. The demand curve shifts rightward.
C. The price elasticity of demand decreases.
D. The demand curve for complements shifts leftward.