Question 153Safety & Environmental - 1st Asst/Chief

The correct answer is B) smaller than normal concentrations of hydrogen sulfide. Individuals who have consumed alcohol within 24 hours of exposure to hydrogen sulfide have a reduced tolerance to the gas. Alcohol impairs the body's ability to detect and respond to the presence of hydrogen sulfide, so smaller concentrations that would normally be tolerable become dangerous. The other answer choices are incorrect because they do not accurately reflect the reduced tolerance and increased sensitivity to hydrogen sulfide caused by recent alcohol consumption.