The mother of a 7-year-old boy who has recently been diagnosed with childhood asthma has come to the ...

The mother of a 7-year-old boy who has recently been diagnosed with childhood asthma has come to the education center to learn more about her son's condition. Which of the following teaching points is most justifiable?
 
  A)
  Research has shown that viruses may actually be a factor in many children's asthma.
  B)
  The most reliable indicator that your child is having an asthma attack is audible wheezing.
  C)
  Steroids that your child can inhale will likely be the first line of defense.
  D)
  Your son will likely need to limit or avoid exercise and sports.