The patrons of the work were the Cornaro family of Rome whose portraits are visible in the chapel. Hence, the answer is option D. Read below about the Cornaro family of Rome.
The family and name Cornaro are descendants from the gens Cornelia, a patrician family of Ancient Rome. The Cornari were among the twelve tribunal families of the Republic of Venice and provided founder members of the Great Council in 1172.
Therefore, the patrons of the work were the Cornaro family of Rome whose portraits are visible in the chapel.
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