Refer to the accompanying figure.
Suppose Zeynep's budget constraint is initially given by BC1. If her budget constraint shifts to BC2, this could be the result of:
A. a decrease in the price of cheese sandwiches and an increase in the price of ham sandwiches.
B. a decrease in the price of cheese sandwiches and an increase in income.
C. an increase in the price of cheese sandwiches and a decrease in income.
D. an increase in the price of cheese sandwiches and a decrease in the price of ham sandwiches.
Answer: B
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