【单选题】A credit may be advised to a beneficiary through another bank (the advising bank) without engagement on the part of the advising bank, but that bank, if it elects to advise the credit, shall ______.
A.
inform. the issuing bank of the credit which it advises without delay
B.
endorse the amount negotiated on the reverse of the credit which it advises
C.
add his confirmation to the credit which it advises
D.
take reasonable care to check the apparent authenticity of the credit which it advises