Which innovation had the greatest effect on the growth of cities and the expansion of cities to suburbs? A) new modes of transportation

B) new leadership styles of mayors

C) new forms of politics

D) new federal government programs

Which of the following was not an important contribution made by the lewis and clark expedition? a. they made detailed descriptions of the terrain of the louisiana territory. b. they fostered relationships with native american tribes. c. they advanced the u.s. fur trade with european buyers. d. they secured the u.s. border of the oregon territory by negotiating a treaty with england.