Directions - In the question given below, a part of the sentence is underlined. Below are given alternatives to the underlined
part which may improve the sentence.
Choose the correct alternative. In case,
no improvement is needed,option (4) is the correct answer.
Many countries have eradicated this disease thirty years ago while some are still ignorant of the vaccination and immunization for the disease.

Options

A. had eradicated
B. did eradicate
C. eradicated
D. No Improvement

Answer

C