While working with heat in the laboratory, which of the following should you do? a. leave a flame or operating hot plate unattended b. point a heating container away from yourself c. reach across an open flame d. heat a liquid in a closed container

I say it would be B. because it is the safest for you. You should never reach across a flame because of the risk of catching on fire. And never leave a flame unattended. Heating a liquid in a closed container could be dangerous as well because it heats fast and could go wrong. I hope this helps!

Reproduction i think