Which of the Following Are Indications for RSV Prophylactic Therapy

Which of the following are indications for RSV prophylactic therapy?
1) Infants less than 32 weeks and requiring FiO₂ greater than 0.21 for at least the first 28 days of life
2) Cyanotic heart defects in the first year of life
3) Severely immunocompromised children less than 24 months of age
4) Children with cystic fibrosis

A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only