The parents of a hospitalized 9-month-old infant ask if their preschool child may visit his younger ...

The parents of a hospitalized 9-month-old infant ask if their preschool child may visit his younger sibling. What understanding would assist the nurse most in formulating a response?
 
  a. Preschool children can be disruptive in the hospital environment.
  b. Seeing his younger sibling would probably frighten the preschooler and thus should be avoided.
  c. The sibling could view the infant from the doorway but not enter the room to prevent the spread of microorganisms.
  d. The preschooler needs to visit his infant sister to reassure himself that she is all right.