Answer: D. Champollion wrote in his journal: "At last I have visited the palace, or rather the city, of monuments, Karnak. . . . No nation on earth, ancient or modern, has ever conceived architecture on so noble and vast a scale. . . ."
Explanation:
The detail from the excerpt that is the best evidence to support the thesis will be option D "Champollion wrote in his journal: "At last I have visited the palace, or rather the city, of monuments, Karnak. . . . No nation on earth, ancient or modern, has ever conceived architecture on so noble and vast a scale. . . ."
This can be seen in the excerpt and really doesn't need an explanation.