The correct answer would be - applying a bulky dressing.
Explanation:
An injury due to falling hard onto a railing on his chest can lead to a serious issue such as rib popping out or dislocation of ribs which is the case here according to the symptoms. Dyspnea is a term used for shortness of breath due to any underlying disease or injury related to lung or chest area.
Exposure of chest also suggests that it is most likely the case of dislocation or popping out of the ribs. It should not be a move or tightly packed thus bulky dressing would be the appropriate action.
Thus, the correct answer is - applying a bulky dressing.
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