问题详情

Usually,theoriginalinvestmentbanker______.
A．subscribestotheissueinitsentirety
B．isprohibitedfromsubscribingtotheissue
C．subscribestoapartoftheissue
D．isprohibitedfromsubscribingtoonlypartoftheissue

请帮忙给出正确答案和分析，谢谢！