XY is the budget line for an individual consumer. Which changes might keep the position of XY unchanged?
- Aconsumer’s income decrease; price of good M decrease; price of good N increase
- Bconsumer’s income decrease; price of good M increase; price of good N increase
- Cconsumer’s income increase; price of good M increase; price of good N decrease
- Dconsumer’s income increase; price of good M increase; price of good N increase