To prevent accidental poisoning, you should not a. mix chemicals in well ventilated areas b. follow the instructions on the label c. keep materials in unlabeled containers d. use chemicals in well ventilated areas select the best answer from the choices provided. a b c d

C. keep materials in unlabeled containers

Explanation:

Some chemicals (like acids, for example) or mixing chemicals produce reactions and the liberation of gases, a well-ventilated area is needed in order to prevent the inspiration of potentially dangerous gases and therefore accidental poisoning. Another way to prevent poisoning is by following the instructions on the labels of chemical reacts, they usually give tips to correctly handle them.

In conclusion, the correct answer is C. keep materials in unlabeled containers because this error can lead to the potential confusion between reactants and that could lead to accidents by inhaling them, touching them or mixing them incorrectly.

I hope you find this information useful and interesting! Good luck!