Under What Conditions Must the Seller Keep Capital Against the Securitized

Under what conditions must the seller keep capital against the securitized asset?

A) An asset is sold along with a put option that entitles the buyer to sell the asset
Back to the seller.
B) The sale of an asset is guaranteed by a third party with a portion of the risk
Remaining with the seller.
C) The sale of a short-term commitment.
D) All of the above
E) None of the above