Which Is Not True Regarding Dyspnea in Cardiopulmonary Patients

Which is not true regarding dyspnea in cardiopulmonary patients?

A) Is not usually related to metabolic acidosis-induced hydrogen ion stimulus.
B) Increased pressure in the right side of the heart and pulmonary circulation during exertion may stimulate mechanoreceptors that increase ventilation and induce dyspnea.
C) A recent onset of dyspnea is more characteristic of heart failure than of chronic lung disease, which has a longer, more insidious onset.
D) Acute pulmonary problems such as pneumothorax, atelectasis, pneumonia, and other conditions superimposed on chronic lung disease can also explain a recent intensification of symptoms.