Two UCC concepts relating to secured transactions are "attachment" and "perfection." Which of the following is correct in connection with the similarities and differences between these two concepts? a. they are mutually exclusive and wholly independent of each other b. Attachment relates primarily to the rights against the debtor and perfection relates primarily to the rights against third parties. c. Satisfaction of one automatically satisfies the other d. It is not possible to have a simultaneous attachment and perfection