Mashaal Masha
Occupying a significant part of modern-day Nigeria, the Kingdom of Benin was one of the major powers in West Africa between the thirteenth and nineteenth centuries. It ________ ruled by Oba Ewuare I from 1440 to 1473.

Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Easy
A: 

is

B: 

will be

C: 

has been

D: 

was

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