**Core Concept:**
Mechanical ventilation is a life-saving intervention used in the ICU to provide respiratory support to patients who are unable to breathe independently due to various reasons. The ventilator monitors and adjusts different parameters, including peak and plateau pressures. These pressures are related to the forces exerted by the ventilator against the respiratory system and the patient's respiratory effort.

**Why the Correct Answer is Right:**
When ventilator-induced lung injury (VILI) occurs, the increased peak and plateau pressures during inspiration indicate that the ventilator is delivering excessive pressure to the patient's lungs, leading to tissue damage and worsening of the patient's condition. In this case, the correct answer would be **Option D**:

**Why Each Wrong Option is Incorrect:**
Option A (Increase in plateau pressure only) could represent a situation where the ventilator's tidal volume is too high, leading to VILI. However, this does not explain the simultaneous increase in peak pressure, which is essential in this question.

Option B (Increase in peak pressure only) might be seen in situations like increased airway resistance or inadequate tidal volume, without excessive pressure. However, in this question, both peak and plateau pressures are increasing, indicating VILI.

Option C (No increase in pressures) is not applicable, as the question presents a scenario of increased peak and plateau pressures during inspiration.

**Clinical Pearl:**
Increased peak and plateau pressures during mechanical ventilation are a red flag for ventilator-induced lung injury (VILI), which is a crucial aspect to understand for critical care physicians and respiratory therapists. Properly adjusting ventilator settings, like tidal volume and PEEP, can help prevent VILI and improve patient outcomes.