The correct option is D Exposure to fresh Air
Exercise-induced asthma, sometimes called exercise-induced bronchospasm or sports-induced asthma, is common. About 90% of people with asthma have symptoms of asthma during or after exercise.
Cardiac asthma is a condition caused by heart failure that leads to asthma-like symptoms, such as wheezing, coughing, and trouble breathing. It is caused by a buildup of fluid in the lungs due to the inability of the heart to effectively clear fluid from the lungs.
People with a BMI of 30 or more have a much higher risk of having asthma than those with a lower BMI. Hence, obesity can also cause asthma.