Answer:
A) Boyle's Law
Explanation:
Boyle's Law states that pressure is inversely proportional to volume if the temperature and volume remain constant in closed system
[tex]{P}=\frac{1}{V}[/tex]
[tex]{P_1}\times {V_1}={P_2}\times {V_2}[/tex]
As it is seen here the volume and temperature remain constant but the volume of the container is doubled.
So, this is an example of Boyle's Law.