A - only the national level can declare war
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Trickle-down economics, or “trickle-down theory,” states that tax breaks and benefits for corporations and the wealthy will trickle down to everyone else. It argues for income and capital gains tax breaks or other financial benefits to large businesses, investors, and entrepreneurs to stimulate economic growth. The argument hinges on two assumptions: All members of society benefit from growth, and growth is most likely to come from those with the resources and skills to increase productive output.
The amendment which guarantees a trial by jury if you're accused of a crime is the 6th amendment.
The 6th amendment guarantees that you must have a trial by a jury of your peers. If you need any other help with what the 6th amendment offers, I recommend this website in order to further research the amendments of the constitution: https://www.law.cornell.edu/constitution/sixth_amendment