21.
(D).
Because of the speculation that the tuberculosis outbreak in Country
X was the result of an outbreak of tuberculosis in Country Y, health officials
in Country X have proposed requiring all visitors from Country Y to undergo
a medical examination. You are asked to find a choice that suggests that this
proposal will
not
have the desired effect of curbing the spread of tuberculosis
in Country X.
(A) This has no bearing on the situation between Country X and Country Y.
(B) This suggests only that the proposal would not prevent ALL cases. But
even if the proposal does not prevent all cases, it could help prevent many.
(C) This suggests only that the proposal would not catch ALL carriers of the
disease from Country Y. But even if the proposal does not prevent all cases, it
could help prevent many.
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