The Food Stamp Example in Example 1 Demonstrates

The Food Stamp example in Example 1 demonstrates

A) Recipients were receiving too many stamps and so they reduced their spending when they received the debit card.
B) Recipients preferred to use the stamps and so they reduced their spending when they received the debit card.
C) Recipients treated money on the debit card differently than the stamps and so they purchased less with the debit card than they had with the stamps.
D) Recipients did not like to carry the debit card because of the stigma behind it and so they purchased less.