A, because it makes the most sense in this context.
D I think........................................................
They gave us the written word where before stories were word of mouth. Even though they wrote in Latin many of the root words are used today in the English language. The gave us measurements like mile, foot and inche. Also Roman numerals are still used, especially in regards to time-pieces. They gave us Christianity. They also introduced some spices and small animals like poultry.
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.
