Just now,I saw the man ______ into the classroom.A went B.to go C.go D.goes

Just now,I saw the man ______ into the classroom.A went B.to go C.go D.goes
这道题选C还是选A呢?如果选C,考的就是see sb.do sth.
但是我可以把saw后面的看成宾语从句,选A我觉得也说得通.是不是题目有误,
宾语从句的that无意可以被省略掉呀！