Who appointed the committee to write the declaration of independence

The Committee of 5, John Adams, Benjamin Franklin, Thomas Jefferson, Robert r. Livingston and Rodger Sherman

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2. to promote conservation in support of the troops

The poster is promoting the view that "food will win the war". They also draw many of the people's lives or family history, in that they (or their ancestors) came to the US for freedom, and now that their freedom is under attack by the Central Power, they must fight to preserve it.

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