A premature baby usually has difficulty breathing. However, the respiratory system is developed enough for survival by ________.
A. 17 weeks
B. 24 weeks
C. 28 weeks
D. 36 weeks
Answer:C
A premature baby usually has difficulty breathing. However, the respiratory system is developed enough for survival by ________.
A. 17 weeks B. 24 weeks C. 28 weeks D. 36 weeks