Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
Smallpox is a dangerous disease. Malaria is a dangerous disease.
A.Smallpox is a dangerous disease, and so is malaria.
B.Malaria is a dangerous disease, but smallpox is not.
C.Neither smallpox nor malaria is a dangerous disease.
D.Either smallpox or malaria is a dangerous disease.

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