Which of the following describes a unitary system of government?
A. a federal arrangement of central government and
states
B. the United States under the Articles of
Confederation
C. a country in which the central government holds
all the power
D independent legislatures in several provinces

C

Explanation:

unitary = under one

to contain the wave of communism

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.