Question

3.You observe that the quantity sold of VCRs over the last 3 year has increased but that price has remained roughly constant. The best explanation for this is:

The price of televisions has risen and the popularity of VCRs has increased.
The cost of video tape rentals has fallen and consumer tastes have remained unchanged.
VCR manufacturing costs have decreased and the popularity of VCRs has increased.
Production technology has remained unchanged and the popularity of VCRs has increased.
Manufacturing costs have risen and more and more consumers think VCRs are only for mindless jerks.