Which of the Following Will Keep a Consumer on the Same

Multiple Choice

Which of the following will keep a consumer on the same indifference curve even if he wishes to move to a higher one?

A) An increase in the consumer's income
B) An increase in the relative price of one good the consumer purchases,other prices remaining unchanged
C) A decrease in the relative price of one good the consumer purchases,other prices remaining unchanged
D) A doubling of the consumer's income and a halving of the prices of all the goods the consumer purchases