Under What Circumstances May the Buyer Seek the Remedy of Replevin

Under what circumstances may the buyer seek the remedy of replevin?

A) Where the buyer has been unable to obtain cover.
B) Where the goods have been shipped under reservation of a security interest in the seller and that interest has been satisfied.
C) Where the goods are specially manufactured but can be purchased from another source.
D) Both (a) and (b) above are correct.