What is TRUE about social mobility in the United States? OA
In the past, social mobility has been very rare.
ОВ.
There is usually more downward mobility than upward mobility.
O c.
More recently, the middle class has become smaller.
OD.
The opportunities for upward mobility continue to grow rapidly.

ever since wwii tmthey always did hated each other.

given all the practice it takes to become proficient at writing up ncoer's, , awards, and conselings as well as learning how to become a well rounded   leader , and managing different types of people

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

a) which ethnic groups live in this community?

i just took test