<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 28-year-old man comes to his general practitioner for a regular checkup. He has had trouble breathing lately with coughing, shortness of breath, and wheezing. Problems first started when he went running outside, but he is also observing the problems when taking a light walk or resting. As a child, he suffered from atopic dermatitis, just like his father and sister. He also has a history of hay fever. What is the most likely cause of his symptoms?? A: Exercise, B: Chronic obstructive pulmonary disease, C: Type I hypersensitivity, D: Smoking, E: Type IV hypersensitivity,  <response>: Based on the information provided in the question stem, the key details are:- 28-year-old man with breathing problems like coughing, shortness of breath, and wheezing- Symptoms started during exercise but now occur even with light activity or at rest - History of atopic dermatitis, hay fever, and family history of atopic dermatitis- No mention of smoking historyThe symptoms of cough, wheezing, and shortness of breath that occur even with light activity suggest an obstructive airway disease. His history of atopic dermatitis and hay fever point to an allergicatopic origin. The family history also supports a genetic predisposition. Therefore, this sounds most consistent with type I hypersensitivity reaction as the underlying cause.C: Type I hypersensitivity 