It is not_______ for me to return all the books to the library now because I still need them.

A．difficult

B．convenient

C．available

D．important

保荐机构应将履行保荐职责时发表的意见及时告知发行人，同时在保荐工作底稿中保存，并可依照规定公开发表声明、向中国证监会或者证券交易所报告。( )