Which sentence is correct some of the contestants were very nervous. some of the contestants seems very nervous. some of the contestants is very nervous. some of the contestants was very nervous.

easy - boys have problems.

i hope this ! (:

the gas pressure p, gas volume v, and gas temperature t are given in the formula:   pv=nrt,

r is the gas constant, and n is the number of gas moles.

if the container is cooled and remains under atmospheric pressure, where r is a constant that does not change, the volume of the container remains the same, the conclusion is drawn that, with all other values ​​unchanged, the number of gas moles n, is decreases.

the right answer is a.