Which statement describes a major advantage of a federal system of government over a unitary system?
a. it eliminates the possibility that individual states might pass conflicting laws.
b. it ensures that a country's government cannot become authoritarian.
c. it eliminates a single national government in favor of individual state governments.
d. it prevents a single national government from holding all of a country's power.

D. It prevents a single national government from holding all of a country's power.

id say bottom left to top top left to bottom right and middle to middle

explanation:

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.