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.