In which city was the constitutional convention held

The Constitutional Convention (also known as the Philadelphia Convention the Federal Convention, or the Grand Convention at Philadelphia) took place from May 25 to September 17, 1787, in the old Pennsylvania State House (later known as Independence Hall because of the adoption of the Declaration of Independence there

they sometimes resort to unethical tactics.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.