Correct option is C
The traveller who mentions the Mahanavami Dibba as the 'House of Victory' is Domingo Paes.
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Domingo Paes was a Portuguese traveler who visited the Vijayanagara Empire around 1520-1522 CE during the reign of Krishnadevaraya.
In his detailed account, he referred to the Mahanavami Dibba—the massive ceremonial platform at the capital—as the "House of Victory".
He described in detail the spectacular Mahanavami (Dasara) festival celebrated there, which was a major public display of the king's power and prestige.