Final answer:
Children typically grow to four times their newborn weight by age 2, so the correct answer is B) 4.
Step-by-step explanation:
From birth to the age of 2 years, children typically grow to quadruple their newborn weights. Therefore, the correct answer to the question is B) 4 times their newborn weight. This is based on the average growth rate, where a newborn's weight usually doubles in six months, triples by one year, and quadruples by two years. This pattern outlines the typical rapid physical development seen in the early years of life.