## **Core Concept**
The question revolves around the management of a preterm infant with respiratory distress syndrome (RDS), which is a common condition in premature babies due to **surfactant deficiency**. Surfactant reduces surface tension in the lungs, facilitating easier lung expansion during breathing. Preterm infants often require interventions to support their respiratory system.

## **Why the Correct Answer is Right**
The correct approach for a preterm infant with moderate respiratory distress at 30 weeks gestation involves providing **surfactant replacement therapy** and ensuring adequate ventilation and oxygenation. Among the given options, administering surfactant (if not already done) and providing **CPAP (Continuous Positive Airway Pressure)** or intubation and mechanical ventilation with surfactant administration are critical steps. The most logical next step, given the scenario, leans towards ensuring airway stabilization and support, which aligns with providing **oxygen therapy and/or CPAP** as an initial step before considering intubation and surfactant administration.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, so we proceed with the understanding that the correct answer is associated with supportive respiratory care.
- **Option B:** Similarly, without the specific details of Option B, we focus on the principles of RDS management.
- **Option C:** This might involve pharmacological interventions or other supportive measures not directly related to immediate respiratory support.
- **Option D:** Without specifics, we acknowledge that incorrect options likely involve either delayed or inappropriate interventions for RDS.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **preterm infants with RDS often require early intervention with surfactant replacement therapy and respiratory support**, which can significantly improve outcomes. Early recognition and management are crucial. A useful mnemonic for RDS management might not be straightforward, but recalling that **"S" is for Surfactant** and **"CPAP" for respiratory support** can guide immediate actions.

## **Correct Answer:** C.