One of the most significant challenges is building an airplane had to do with "propulsion", since the technology that allowed motors to have enough energy to lift an airplane into the sky with a passenger wasn't available for most of history.
Answer:
c) french settlements that comprised military garrisons, trading outposts, and missions
Explanation:
Answer:
To "ratify" something means to confirm by expressing consent/approval
Explanation: For example,
Numerous countries have refused to ratify the treaty.
Answer:
D. secede from the Union.
Explanation:
the Emancipation Proclamation officially took effect, the ideals of the Proclamation had been carefully contemplated by President Lincoln many months before.
