In which situation would a system of currency exchange be necessary? A.
A person in Nigeria trades his bicycle for his friend’s new skateboard.

B.
A business in Egypt pays its workers their wages at the end of the week.

C.
A person in Kenya pays the taxes she owes to the local government.

D.
A business in South Africa buys automobile parts from a business in China.

I don't know English sorry I would like to help you but I don't know English

after balancing the chemical equation, what are the coefficients for these compounds?

h2s      

⇒ 3

hno3    

⇒ 2

works for edg

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.