Which of the Following Statements Reflect(s)the Recommendations of the NFPA

Which of the following statements reflect(s) the recommendations of the NFPA and CGA for storing cylinders outdoors?
1) Cylinders should not be stored in an area where the temperature exceeds 125° F.
2) Cylinders must be protected from the weather.
3) Full and empty cylinders should be kept separate.
4) Cylinders should not be stored outside

A) 4
B) 1 and 2
C) 2 and 3
D) 1,2,and 3