Twenty-six journalists from 19 media organizations of different countries and regions are

问题补充：

Twenty-six journalists from 19 media organizations of different countries and regions are the first ones the unrest of “the Red-shirts” in Tailand capital.

A. covered

B. covers

C. to cover

D. covering

答案：

A. covered

B. covers

(答案→)C. to cover

D. covering

解析：名词或代词前被序数词或形容词最高级修饰时，后应用不定式作定语，句中ones被the first修饰，所以用不定式to cover 作定语选C。