Direction: In the sentence given below, a part is highlighted and suggestions for its correction are given below the sentence. Choose the correct option, which can improve the original sentence without changing its meaning. If the highlighted part is correct, select ‘No improvement required’ as your answer. Even with the myriad of challenges and obstacles, successfully completing the marathon were quite an achievement, was it?
A. was quite an achievement, was it?
B. was quite an achievement, wasn't it?
C. were quite an achievement, weren’t they?