According to the passage, Benjamin Thompson was the designer for a project in ______.

A．It is clearly the best of the projects discussed.
B．It is a good project that could be copied in other cities.
C．The extensive use of bulldozers made the project unnecessarily costly.
D．The work done on the river was more important than the work done on the buildings.

A．the weakening of the US dollar can result in trade deficits
B．the lower the retail prices, the greater in profits
C．tourism can make great contributions to its economy
D．visitors to the US are wealthier than US tourists abroad