【单选题】A consumer’s behavior was observed in three situations with different prices and incomes. In situation 1, she chose a bundle that cost $1,600. In situation 2, she chose a bundle that cost $2,500. In s...
A.
1 must cost less than $3,100 at situation 3 prices
B.
3 must cost at least $3,100 at situation 1 prices
C.
1 can not cost less than $3,100 at situation 3 prices