An order is a request to supply a specified quantity of goods， which may result from（） or（） with subsequent quotations.

An order is a request to supply a specified quantity of goods， which may result from（） or（） with subsequent quotations.
A、an offer … a bid
B、an offer … an inquiry
C、a bid … a counter-offe
D、a counter-offer … a counter-offer
正确答案：A