I believe it is at but at the same time I don't know what onomatopoeia means.
At Jundi Shapur the best scholars west of China all gathered to think and study together. By the 600s, the doctors at the school were writing about a medicine from India named sharkara or, as the Persians called it, shaker—sugar. Indeed, scholars at Jundi Shapur invented new and better ways to refine cane into sugar.
The answer is d, unenthusiastic.