Along an Indifference Curve,if the Marginal Rate of Substitution Is

Multiple Choice

Along an indifference curve,if the marginal rate of substitution is 3,then the consumer is willing to

A) give up 1 unit of the good measured along the y-axis for 3 units of the good measured along the x-axis.
B) give up 3 units of the good measured along the y-axis for 1 unit of the good measured along the x-axis.
C) pay $3 for one unit of the good measured along the y-axis.
D) pay $3 for one unit of the good measured along the x-axis.
E) give up 3 units of the good measured along the y-axis for 1 unit of income, that is, $1 of income.