A line graph shows quantity demanded on the x-axis from 0 to 30 and price in dollars from 0 to 25. A line labeled D starts at point (5,25) and decreases to point (25,5). Other points appear between. A line labeled D subscript 1 starts at point (7,22.5) and decreases to point (27,2.5). Other points appear between. A line labeled D subscript 2 is not visible, but there is an arrow pointing left for this line. An arrow points right for line D subscript 1. If the demand curve shown above shifts to the left then the . A. price increased B. demand increased C. price decreased D. demand decreased