I think it's the telephone because it allows people to communicate better and customers or workers don't have to walk up to everyone and disturb them. You may elaborate more on this with your own opinion
The answer is option A.
California and New York has
been immigration centers for decades. New York itself is a symbol of
immigration in the world. This city has received immigrants from all
parts
of the world since the middle of the nineteenth century,
with people from more than 100 countries living actually in the city.
San Francisco, located in the West Coast, has
a more recent
history, attracting immigrants manly from Asia, having a significant
amount of inhabitants with Chinese origin, forming a fifth of the
population. Also, its liberal
values has attracted in the last fifty years people from all parts of the U.S and the world who share these views.
Pretty good. I don’t think this is a question for Brainly though.