What was one of the challenges Richard Nixon faced as president ?

The development of humans was directly dependent ondevelopment of a language.development of communication between people.e development of tools.litdevelopment of the wheel.

What were the terms behind germany's surrender during wwi?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.