**Core Concept**
Laryngomalacia is a congenital condition characterized by the softening of the tissues of the larynx, particularly the supraglottic region. This softening can lead to partial airway obstruction, causing symptoms such as stridor, coughing, and difficulty breathing in infants.

**Why the Correct Answer is Right**
The correct answer is one that does not accurately describe laryngomalacia. Laryngomalacia typically presents in the first few weeks of life, with symptoms worsening as the infant cries. The condition is often associated with a floppy epiglottis and a narrow or floppy aryepiglottic fold. The diagnosis is often made based on clinical presentation and confirmed with laryngoscopy.

**Why Each Wrong Option is Incorrect**
* **Option A:** Laryngomalacia is not typically a condition associated with a family history. While some cases may be associated with genetic conditions, the majority are sporadic.
* **Option B:** Laryngomalacia is indeed a condition that can cause significant distress and respiratory compromise in infants. However, it is not typically a life-threatening condition and is usually managed conservatively.
* **Option C:** Laryngomalacia is not typically a condition associated with a significant increase in mortality. While it can cause significant distress and respiratory compromise, it is usually managed conservatively and has a good prognosis.

**Clinical Pearl / High-Yield Fact**
Laryngomalacia is often associated with other conditions such as gastroesophageal reflux disease (GERD) and congenital heart disease. A high index of suspicion is necessary to diagnose laryngomalacia, as the symptoms can be subtle and easily mistaken for other conditions.

**Correct Answer:** C.