Which of the following is true about office friendships?
a. workplace cliques can cause horizontal disharmony.
b. office friendships are based mainly on ethnic similarities.
c. it's impossible to develop vertical friendships.
d. they lead to a workplace in which socializing rarely occurs.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

10 years is the answer