Under collection, which of the following are correct? ( )

A、There are obligations for the banks to check the documents and guarantee the payment.
B、If the instructions are D/P at sight, the importer’s bank will release the documents to the importer only against payment.

C、Collecting bank or presenting bank is the bank in the country of the seller or exporter.
D、D/P is more favorable than D/A to the seller.