A. No bowel movement within 12 hours: While concerning, delayed stooling can occur in preterm infants and is not as urgent without additional symptoms like distension or bilious vomiting. B. Small regurgitation of formula: Regurgitation is a common finding in preterm infants and typically not alarming unless persistent or associated with other symptoms like aspiration. C. Abdominal distension: This finding may indicate necrotizing enterocolitis (NEC) or an obstruction, both of which are serious conditions requiring prompt medical attention. D. Uncoordinated suck: This is expected in preterm infants due to immaturity and does not require immediate reporting.