A Helium-Filled Balloon Has a Volume of 1 M³ $\degree$ C and 1 Atm,and Its Final Temperature and Pressure Are

Multiple Choice

A helium-filled balloon has a volume of 1 m³.As it rises in the earth's atmosphere,its volume expands.What will its new volume be (in m³) if its original temperature and pressure are 20 $\degree$ C and 1 atm,and its final temperature and pressure are -40 $\degree$ C and 0.1 atm?

A) 4
B) 6
C) 8
D) 10
E) 1.5