Carlos Can Buy Either Sushi or Eggrolls

Multiple Choice

Carlos can buy either sushi or eggrolls. If the prices of sushi and eggrolls triple and Carlos's money income doubles, we can deduce that Carlos's budget constraint will

A) shift in but remain parallel to the old one.
B) shift out but remain parallel to the old one.
C) swivel in so that the slope of the budget constraint is doubled.
D) remain unchanged.