I would write them all out but im lazy. change the noun after the word by and make that the subject of the sentence followed by the verb and the rest of the sentence :)
Depends on how major or minor the errors are. If the errors are due to lack of knowledge then it isn't a sign of progress but if less errors are being made and they are small ones progress may be shown.
Answer and Explanation:
The context clues allowed me to understand that the word "adopt" had the meaning of "use". This conclusion can be drawn, because the context shows that several authors were inspired by the work "The legend of Arthur" to create their stories. In this way, we can contextualize that these inspirations caused these authors to use original terms from "The legend of Arthur" in the works they wrote, thus allowing them to "adopt" these terms, that is, they used terms that had not been generated by they.