The predominant cause of low-birthweight births in America is

Correct Answer: B

Rationale: Prematurity is the leading cause of low birthweight in the United States

Correct Answer: C

Rationale: The Look-Listen-Feel technique is used to assess breathing by observing chest movement, listening for breath sounds, and feeling for airflow.

Correct Answer: C

Rationale: Most cases of asthma develop before age 6, highlighting early-life exposures and genetic predisposition as key factors in disease onset.

Correct Answer: C

Rationale: Epinephrine is not typically needed for acute urticaria unless there is anaphylaxis. Antihistamines and corticosteroids are preferred treatments.

Correct Answer: D

Rationale: Biliary atresia is the most common cause of neonatal cholestasis. It results from progressive fibrosis and obliteration of the extrahepatic bile ducts, leading to conjugated hyperbilirubinemia.