A tour guide will bring a group of tourists to seven sites—the sites are designated as A, B, C, D, E, F, and G. The tour will span the course of three days, Friday, Saturday, and Sunday. The first two sites will be visited on Friday. The next three sites will be visited on Saturday. The final two sites will be visited on Sunday. The tour guide will organize the site visits according to the following rules: A. Site A must be visited on Sunday. B. Since site B is closed on Friday, it cannot be visited on that day. C. Site C must be visited after site B is visited and before site D is visited. Which one of the following could be the order in which the tour guide organizes the site visits?
1. B, F, C, D, E, A, G.
2. E, C, G, B, D, F, A.
3. F, G, B, C, E, D, A.
4. G, F, B, A, C, E, D.
5. F, G, D, E, B, C, A.