So during the war your allies can help you with what you need: supplies, food,etc. You also don't fight your allies! Hope this helped!
<u> B. It gives specific powers to the federal government.</u>
The United States Constitution grants specific powers and rights to the federal government, called "delegated powers", if it is not outlined in it, then the government should not do it. Furthermore, the Tenth Amendment establishes that all powers that aren't listed in the Constitution are granted to the people or the states. This way, it prevents conflict between federal and state government, and also prevents the government from abusing of its power.
The slave trade was a practice whcih played a major rolein the colonial economy. It started when the African slaves were brought to the caribbean mainly to work in plantations, or in places were labor was needed, due to diseases and the mortality rate. At the beginning, the colonies did not really required large numbers of slaves.
The first colony receiving slaves was Virginia, which in 1619 received the first ones. This cipher grew up exponentially during thefollowing years,and it is estimated that by 1770,the numberof slaves was over 185.000 in Virginia alone, which makes it the Colony with the highest number.