John, the secured party, perfects its security interest by filing a financing statement. What is the effect of perfection of John's security interest?
a. The secured party has priority in the collateral over most creditors who acquire a security interest in the same collateral after the filing.
b. The security interest becomes enforceable against the debtor.
c. The debtor is protected against all other parties who acquire an interest in the collateral after the filing.
d. The assets subject to the security interest do not become part of the bankruptcy estate in the event the creditor files an involuntary petition against the debtor.