GMAT Sentence Correction (SC) | Re: After the Second World War, the city of Cologne started the repair of

After the Second World War, the city of Colognestarted the repair of the historical Cathedral, a project, taking almost a decade to finish; the Bild, the largest daily, described as the most expensive repair undertaken ever.


A) the repair of the historical Cathedral, a project, taking almost a decade to finish;
B) repairing the historical Cathedral, a project that took almost a decade to finish;
C) repairing the historical Cathedral, a project that had taken almost a decade to finish and
D)