If society begins by producing 3 units of X and 4 units of Y, and then alters production so that it is now producing 3 units of X and 5 units of Y, and we know that the quantity and quality of resources were unchanged and that technology did not change, then

[A] resources were being efficiently utilized at 3 units of X and 4 units

[B] 3 units of X and 4 units of Y are a combination best represented by a point inside the PPC.

[C] 3 units of X and 4 units of Y are a combination best represented by a point outside the PPC.

[D] it is not possible to produce 3 units of X and 5 units of Y.

[E] society has moved along the PPC.