Like a boil that can never be cured if it is covered up but must be opened with all its pus-flowing ugliness
this is a sentence that i need figuring out. it is part of martin luther kings letter from birmingham jail. what type of sentence(allusion, metaphor etc.) is it and what does it mean?

How were stories with supernatural elements viewed differently in shakespeare's time versus how they are viewed today? a. audiences during shakespeare's time only believed in things that could be explained rationally, unlike audiences today, who believe in the supernatural. b. audiences during shakespeare's time saw supernatural elements in a much more humorous light than today's audiences do. c. audiences during shakespeare's time were used to witches in their neighborhoods, so they didn't find them as scary as we do today. d. audiences during shakespeare's time considered witches and curses to be real and therefore much scarier than today's audiences would.