County Health Inspector: Here in the county about sixteen percent of

         the raccoons tested for rabies were found to be infected with

         the disease.  But only raccoons that had come into contact with

         a person or a pet were tested.  Therefore there is reason to

         believe that considerably fewer than sixteen percent of the

         county’s raccoons are infected with rabies.

  Which of the following, if true, provides the strongest support for the

health inspector’s conclusion?

    A   Healthy raccoons are more likely to come into contact with pets than

       with people.

    B  Raccoons that are infected with rabies are more likely to come into

       contact with people and pets than are healthy raccoons.

    C  Even experts are unable to determine whether or not a raccoon is

       infected with rabies simply by observing its behavior.

    D  Of the skunks tested for rabies in the county, more than six teen per-

       cent were found to be infected with the disease.

    E  There have been no reported cases in the county of the transmission

       of rabies from a raccoon to a dog that had been vaccinated against

       the disease.

答案B