A Chinese Company A offered an Australian Company B, selling them a batch of some goods. Besides some necessary transaction terms and conditions were set out clearly in the offer, the offer also indicated that the payment was made by sight L/C and the delivery was to be made within two months after receipt of the L/C. Company B replied in their letter that they could accept the offer, but asked for immediate delivery.However,Company A didn’t give any answer to this letter. Then presently Company B opened the Letter of Credit at sight, and indicated“immediate shipment”. During that time the marketing price for the goods was rising greatly. So Company A refused to deliver the goods and withdrew the L/C immediately. Questions: (1) Is it right for Company A to do like that? (2) Is there any business relationship between the two companies?