Fortunately, the French had made a number of copies of the inscriptions on the Rosetta Stone. They did this by covering the surface of the Stone with printer’s ink, laying a sheet of paper on it, and rolling rubber rollers over it until good, clear impressions were obtained. Based on the word choice in this excerpt, how does Giblin feel about the French attempt to understand the writings on the Rosetta Stone?

that it was a waste of time
that it was worthwhile
that it was impossible
that it was amazing