Smallpox is a dangerous disease. Malaria is a dang...

Câu hỏi: 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.