Answer: Option (A) is the correct answer.
Step-by-step explanation:
A flammable liquid is a liquid which immediately catches fire when exposed to air, that is, flammable substances are combustible in nature.
Therefore, they need to be kept safely in a container with a lid that can prevent entrance for air. Hence, otherwise it would be unsafe to handle to liquid.
Thus, we can conclude that store liquids in approval metal safety containers or original containers.