Answer: I think it may be A. (It shows how determined Elion was to learn more about biochemistry.)
Answer:https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.dailyrepublic.com/all-dr-news/obituaries/john-bolton-halbrook/&ved=2ahUKEwiPsc775OjnAhUDC6wKHUbqBq4QFjADegQICRAB&usg=AOvVaw0TC0gGYPQJ1HkMpKz1IHN5
Explanation: click dis link
<span>D. But we had not traveled fifty miles down the stream before we found the water gradually becoming brackish and discolored from the salt and</span>
I thinks it’s A hope it helps
B. Traverse
Normally, a speaker would use the word "move" as in "move forward" instead of "traverse forward"