Final answer:
Metabolic acidosis is a condition characterized by excessive acidity of the blood due to too little bicarbonate. Lactic acidosis, diabetic ketoacidosis, and ethanol poisoning are all examples of medical conditions that can cause metabolic acidosis.
Step-by-step explanation:
Metabolic acidosis is a condition characterized by excessive acidity of the blood due to too little bicarbonate. It can be caused by various medical conditions and ingesting specific substances. Some examples of conditions that cause metabolic acidosis are lactic acidosis, diabetic ketoacidosis, and ethanol poisoning. Therefore, option A, Lactic acidosis, diabetic ketoacidosis, ethanol poisoning, is the correct answer.