Improper Storage or Handling of Medical Gas Cylinders Can Result

Improper storage or handling of medical gas cylinders can result in which of the following?
1) Increased risk of fire
2) Explosive releases of high-pressure gas
3) Toxic effects of some gases
4) A contained environment

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