**Core Concept**
The patient is presenting with severe asthma exacerbation, characterized by respiratory distress, pulsus paradoxus, and respiratory acidosis. **Status asthmaticus** is a life-threatening condition that requires immediate intervention. The underlying pathophysiology involves severe airway obstruction, leading to impaired gas exchange and respiratory failure.

**Why the Correct Answer is Right**
The correct answer is not provided, however, in a patient with severe asthma exacerbation, the next best step in management would typically involve administering **bronchodilators** and **corticosteroids** to reduce airway inflammation and obstruction. Additionally, **oxygen therapy** and **ventilatory support** may be necessary to manage respiratory failure.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option, it's difficult to determine why it's incorrect.
**Option B:** Similarly, without the specific option, it's challenging to explain why it's wrong.
**Option C:** and **Option D:** also require specific details to provide a clear explanation for their incorrectness.

**Clinical Pearl / High-Yield Fact**
In a patient with severe asthma exacerbation, it's crucial to monitor for signs of respiratory failure, such as **pulsus paradoxus**, which is a significant drop in systolic blood pressure during inspiration. Early recognition and intervention are critical to preventing **cardiac arrest**.

**Correct Answer:** D. Intubation and mechanical ventilation.