In the late $1970\text{'}$s the American Legion held a convention in Philadelphia. During and following this convention many of the Legionaires became infected with a respiratory disorder and died. Many of those who became ill had been in World War I, yet the hotel staff seemed ineffected by this disease. What is the explanation for the older persons becoming ill as the younger people who had been in the same environment stayed healthy

Select one:

a$.$ This was just a Statistical Anomaly

b$.$ The older members were on lower floors

c$.$ The younger members were on higher floors