Question

multiple-choice question
why does mary warren turn on john proctor?
she realizes the judge was going to believe abigail and the other girls about mary conjuring a spirit, so she went back on their side to avoid getting hanged.
she finally sees john proctor for who he is - a servant of the devil.
she starts believing the hysteria going on around her.
she doesnt like feeling left out :(

Explanation:

In "The Crucible", Mary Warren turns on John Proctor because when the judge is inclined to believe Abigail and the other girls' accusations that Mary conjured a spirit, Mary fears being hanged. To save herself, she backtracks and turns on John. The other options don't align with the plot: she isn't turning on him because she sees him as a servant of the Devil (that's Abigail's false accusation), nor due to feeling left out or believing the hysteria.

Answer:

The correct option is: She realizes the judge was going to believe Abigail and the other girls about Mary conjuring a spirit, so she went back on their side to avoid getting hanged.