Which among the following precautions should be observed to avoid untoward incidents in the kitchen area?

A. Never leave utensils on the floor. Someone is sure to trip over them
B. Never let the long handles of saucepans or skillets extend into aisles
C. Use appropriate knife for specific cutting job
D. Keep the floor free from spilled liquids and other ingredients and put a warning sign when somebody is mopping the floor.