Which of the Following Statements Is True for Claims

Which of the following statements is true for claims?

A) A trustee doesn't receive the defenses that a bankrupt person enjoys against claims.
B) If the debtor's property is subject to a secured claim of a creditor,that creditor has the first claim to it.
C) If a claim is provable,a creditor can participate in the distribution of the assets of the bankruptcy estate.
D) Both secured and unsecured creditors are required to file proofs of claims.