Answer;
b) 7%; the majority
Although 7% of all newborns in the united states fall into the low-birth weight category, they account for the majority of newborn deaths.
Step-by-step explanation;
Low birth weight is a term used to describe babies who are born weighing less than 2,500 grams (5 pounds, 8 ounces). Low birth weight is most often caused by being born too early (premature birth). Another cause of low birth weight is a condition called intrauterine growth restriction (IUGR).
Approximately 7 percent of infants are born with low birthweight and 1.4 percent are born with very low birth weight in the United States each year.