Children’s tendency to be more susceptible to bronchitis and asthma than adults is possibly because, according to recent research, children retain 35 percent more of inhaled airborne particles on the surface of their lungs than adults do.(a) children's tendency to be more susceptible to bronchitis and asthma than adults is(b) children's tendency to be more susceptible than is the case with adults to bronchitis and asthma is(c) children tend toward being more susceptible to bronchitis and asthma than adults, which is(d) children, who tend to be more susceptible to bronchitis and asthma than are adults, are so(e) children tend to be more susceptible than adults to bronchitis and asthma,