问题详情

Theactualmarketingfornewissues______.
A．isusuallydonebyinvestmentbankersindirectlytothepublic
B．is,mostofthetime,donebythecompaniesdirectlytothepublic
C．isneverdonebythecompaniesdirectlytothepublic
D．isusuallydonebytheinvestmentbankerdirectlytothepublic

请帮忙给出正确答案和分析，谢谢！