rom October 17th to 19th, 2009. The forum committee will take the traffic control measures during the time of forum. Firstly, the Tour Road, west of the Greenwood Road will be forbidden for 3 days. And then, the Greenwood Road will forbid large-sized lorries from 7: 00 to 21: 00 on these days. At last, the large-sized lorries will also be forbidden on the Flower Road from 7: 00 to 22: 00 for 3 days.
How long will the forum last?
A.1 day
B.2 days
C.3 days
D.4 days