In the securitization process, the trustee's primary role is to safeguard the assets after they have been sold to the Special Purpose Entity (SPE). The trustee holds the collateral and ensures the funds due to the Asset-Backed Security (ABS) holders are paid. While the SPE legally owns the collateral, the trustee does not own it but is responsible for holding it. This distinction clarifies why option C is correct, as the trustee's function aligns with holding, not owning or selling, the collateral.