When Sending Items on a Case Cart for Sterilization, Which

When sending items on a case cart for sterilization, which of the following is true about unused, sterile items left on the cart?

A) Unused, sterile items should sent back to processing with contaminated items.
B) Unused, sterile items can be used for another surgical process right away.
C) Unused, sterile items should be opened and integrated with the contaminated items.
D) Unused, sterile items should remain on the case cart, with a second cart needed for contaminated items.