In the Context of Shinto Religious Practices, When Worshipers Visit

In the context of Shinto religious practices, when worshipers visit a shrine for a blessing, a priest says a prayer and waves over them a branch or wand adorned with paper streamers to

A) symbolically drive out dangerous spirits.
B) gain the attention of the major kami.
C) allow the worshippers to pass under the torii.
D) purify the devotees and the surrounding areas.