## Core Concept
Transient tachypnea of the newborn (TTN) is a mild respiratory condition that affects newborns, typically in the first few hours of life. It is caused by the delayed clearance of fetal lung fluid after birth. The condition is more common in term and near-term infants.

## Why the Correct Answer is Right
The correct answer, ., implies that the statement regarding TTN being associated with significant hypoxemia or requiring supplemental oxygen therapy is not characteristic. TTN is generally a self-limiting condition that resolves within 24-48 hours without significant complications. It is characterized by tachypnea, mild to moderate respiratory distress, and sometimes mild hypoxemia, but it does not typically require extensive respiratory support.

## Why Each Wrong Option is Incorrect
- **Option A:** While the exact details of option A are not provided, if it describes a characteristic feature of TTN such as tachypnea, mild respiratory distress, or delayed clearance of lung fluid, it would be a true statement about TTN.
- **Option B:** Similarly, if option B outlines a common presentation or risk factor for TTN, such as being born by cesarean section without labor, it would be incorrect to say it is not true about TTN.
- **Option D:** If option D mentions a typical management approach for TTN, such as supportive care and observation, it would also be a true statement.

## Clinical Pearl / High-Yield Fact
A key point to remember is that TTN often presents with tachypnea and mild to moderate respiratory distress but usually does not progress to severe respiratory failure. A critical distinguishing feature is that TTN typically does not require intubation or significant respiratory support, differentiating it from more severe neonatal respiratory conditions.

## Correct Answer Line
**Correct Answer: D.**