The Declaratory Act gave parliament the right to have complete control over the colonies. I quote from the act "in all cases whatsoever" meaning regardless of the situation, Parliament had and reserved the right.
Hernan Cortez destroyed the Aztec Empire.
Australia underwent a population boom because:
Australia was under the British 'empire' during the time. When the British prisons became overcrowded, many of them were shipped to Australia to live there. This increased the amount of people living in Australia exponentially, and eventually cities were founded
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The answer for this Q is C