D is the answer to this question
The author feels like Thomas Young was a pioneer in the deciphering of hieroglyphs since he "got three out of seven symbols, which was a better score than any other scolar before him".
However, the author feels that Thomas Young was too confident in his assumptions, which caused him to fail in his task, and that he "put roadblocks in his own path".
Still, the author believes that Young's contribution was key to the final deciphering of the hieroglyphs, since he "laid a solid groundwork for others in their attempts to decipher the hieroglyphs".
Each of these are indeed different types of pronouns. What in specific do you need help with? :)
