The Following Figure Shows a Portion of a Consumer's Indifference

Multiple Choice

The following figure shows a portion of a consumer's indifference map and budget lines.The price of good Y is $7 and the consumer's income is $700.Let the consumer begin in utility-maximizing equilibrium at point A on indifference curve I.Next the price of good X changes so that the consumer moves to a new utility-maximizing equilibrium at point B on indifference curve II.The substitution effect of the change in the price of X is

A) +12
B) +10
C) -10
D) +32
E) +42