Which is not a precaution to take when handling flammable substances?

Answer: C — Ignoring spills

When handling flammable substances, ignoring spills is not a precaution; in fact, it is a significant safety hazard. Spills can lead to serious accidents, including fires or explosions, especially if the spilled material comes into contact with an ignition source. In contrast, keeping a safe distance from open flames, wearing protective gear, and using proper storage methods are all fundamental precautions that significantly reduce the risk of accidents when working with flammable materials. Keeping a safe distance from flames prevents ignition, wearing protective gear helps protect the individual from exposure and potential hazards, and using proper storage methods ensures that flammable substances are kept in a manner that minimizes the risk of accidental ignition or release. This emphasizes the importance of proper safety protocols in environments where flammable substances are present.