When the gunfire subsided, I climbed out of the tent and saw the man who asked me to lie down with his face down. People around him said he was dead and apparently died of a heart attack. This is also a lot of Congo People's endings will not die in the rain of gunfire, but they will also die in various diseases. From the above text, it is speculated that the most important thing in the emotion that the author witnessed the death of the man was? ['Indifferent.', 'compassion.', 'Condemnation.', 'Anger.']