Answer:
b. The discovery of a more complete copy of the Rosetta Stone decree resulted in fuller translations.
Step-by-step explanation:
This is the statement that best expresses the central idea of the text. In this passage, we learn about a second version of the Rosetta Stone. This version was more complete, which allowed for a few words and phrases to be added to the one found earlier. We also learn that after this slab was discovered, more translations came out, including a Latin version in 1851, a French one in 1867, and an English one in 1871.