Select the best answer for the question.

$13.$ Generally, a security interest is perfected when the

A$.$ buyer takes the property subject to a mortgage and the seller agrees to continue paying the debt.

B$.$ secured party has a legally enforceable right to take that property and sell it to satisfy the debt.

C$.$ goods are sold, but regained as soon as the debtor takes possession of the new property.

D$.$ secured party has done everything that the law requires to give the secured party greater rights to the goods than others have.

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