Choice "A" is correct. The filing of a petition in bankruptcy invokes an automatic stay against all attempts to collect on most debts of the debtor.
Choice "c" is incorrect. The filing of a petition in bankruptcy invokes an automatic stay against all attempts to collect on most debts of the debtor. The filing does not terminate liens, but merely stays them (i.e., temporarily prevents their enforcement).
Choice "b" is incorrect. The filing of a petition in bankruptcy invokes an automatic stay against all attempts to collect on most debts of the debtor. The filing does not terminate security interests but rather merely stays them (i.e., temporarily prevents their enforcement).
Choice "d" is incorrect. The filing of a petition in bankruptcy invokes an automatic stay against all attempts to collect on most debts of the debtor. The filing does not prevent the debtor from incurring new debts.