Which problems did you include in your answer?

The telegraph usually required people to go to offices.

The telegraph wasn’t easy to carry around.

The telegraph couldn’t transmit voices.

The telegraph required a special code to communicate.

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.

the answer is b. hope this !

the foundation of greek city-states: following the fall of the mycenaean civilization in the 10th century bc, the area surrounding the empire went through its own mini dark ages. answer and explanation

i think you may have asked this twice, but i answered one of the