A very large refrigerant leak can cause suffocation because refrigerants: (A) A) are heavier than air and displace oxygen (B) B) sting the nose and cause sneezing (C) Gsmell strong and make breathing difficult. (D) D) are lighter than air and cause dizziness.

To determine the correct answer to the question about why a very large refrigerant leak can cause suffocation, let's analyze each option: (A) **are heavier than air and displace oxygen**: This is a plausible explanation. If refrigerants are heavier than air, they can settle in low-lying areas and displace oxygen, leading to suffocation. (B) **sting the nose and cause sneezing**: While some refrigerants may have a strong odor or cause irritation, this does not directly relate to suffocation. (C) **smell strong and make breathing difficult**: A strong smell may cause discomfort, but it does not necessarily lead to suffocation. (D) **are lighter than air and cause dizziness**: If refrigerants are lighter than air, they would rise and not displace oxygen in a way that would cause suffocation. Based on this analysis, the most accurate answer is: **(A) are heavier than air and displace oxygen.**