The answer is B. the United States.
The line is "I pledge allegiance to the flag of the Unites States of America."
Answer:
april 12, 1861 and lasted 4 years.
In Russia federal government is practiced.
Based on the information given, it should be noted that this period was known as the Industrial Revolution.
The Industrial Revolution was simply the transition to the manufacturing sector from the agrarian economy in the country. This period was dominated by industries.
The Industrial Revolution brought about the advent of the steam-transportation, machine-industralization and the telegraph and eventually the phone.
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