Microeconomics can be defined as a branch of economics where the behavior of individuals and small impacting organizations are studied, where each of these decisions are allocated of limited resources. Microeconomics looks at these behaviors and investigates how it affects the supply and demand of the goods and how this affects the pricing. Macroeconomics studies the total economic activity regarding growth, inflation and unemployment and can deal with national economic policies.
B, because this is answer has nothing to do with American music.
Answer:
At the out burst of the War in 1861, hundreds of Irish and Irish Americans enlisted in the Union Army. Some joined ordinary regiments, but others created three all Irish voluntary infantries: the 63rd New York Infantry Regiment, arranged on Staten Island