--- What about _____ lecture?

---- It’s too tiring, as is known, _____ lecture for me.

A．a; the

B．the; the

C．the; /

D．the; a

债项评级用于评估债项损失风险，以违约损失率作为核心要素，考虑产品、贷款用途和抵质押品等债项风险特征。（）