Answer:
Personally I think the 3rd one would be the best revised
Explanation: While the others are well put this one puts everything into correct context and where it makes the most sense.
Again not 100% sure been awhile since I took English, but it sounds right to me.
The best and the most correct answer among the choices provided by the question is the fourth choice. The main idea that the reader should include is that <span>Jekyll had a hard time choosing between being Jekyll and Hyde</span>. I hope my answer has come to your help. God bless and have a nice day ahead!
I think the excerpt you are talking about is...
"Dantès entered the second grotto. The second grotto was lower and more gloomy than the first; the air that could only enter by the newly formed opening had the mephitic smell Dantès was surprised not to find in the outer cavern. He waited in order to allow pure air to displace the foul atmosphere, and then went on." from The Court of Monte Cristo.
A synonym or the word grotto could be cave/cavern. Hope this helps!