单项选择题

Questions 17-20 are based on a talk about city traffic problem. You now have 20 seconds to read Questions 17 - 20. How do the traffic wardens protect the form they give to the motorist from rain

A.They put the form in a little plastic envelope.
B.They put the form under one of the windscreen wipers.
C.They wait there until the motorist returns.
D.They will ask the motorist to go to their office for the form.