A moment of having an idea or a sudden moment of realization.
Answer:
What text? I cannot help you without the text.
Hmm.. That would be cool but quite dangerous. If you think about it, we could send them to war instead of our troops, saving thousands of lives.
Answer:
<em>C. the nation, and since then,</em>
Exclamation: If you're joining two sentences together you need a comma to do so. By placing a comma after "nation" and "then" you are making a run-on sentence.
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