Ancient egyptians depended on the nile river for agricultural activities. which innovation could have reduced the dependency of egyptian agriculture on the annual flooding of the nile river?
a) the use of a metal plow
b) the building of oxcarts
c)the building of canals
d) farming on the slopes of hills

although the legal justifications for the trials and their procedural innovations were controversial at the time, the nuremberg trials are now regarded as a milestone toward the establishment of a permanent international court, and an important precedent for dealing with later instances of genocide and other crimes

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.