Categorize each scenario as describing a movement along a demand curve or a shift of the demand curve.
a. College students rush and buy discount furniture to take advantage of a one-day sale
b. Students eat out more often as the federal government increase how much grant money it provides
c. College students reduce how detergent they for each of laundry response to higher detergent prices.
d. College students purchase many more energy drinks during finals week than during the rest of the semester.
