Suppose that a market consists of 100 buyers who are each willing to buy at most one unit of a good.

Willingness to pay is equal to:

$20 for the first 20 buyers

$18 for the following 10 buyers

$12 for the following 20 buyers

$6 for the following 20 buyers

$4 for the following 30 buyers

What happens to consumer surplus if price falls from $7 to $5?

A.

rises by $200

B.

rises by $100

C.

falls by $200

D.

rises by $120

E.

None of the above