Which best explains a strategy for ensuring a beginner audience will understand your essay?
a. you can use casual expressions and slang.
b. you can use nonstandard english.
c. you should use extremely formal word choice and sentence structure.
d. you must make sure you define technical language.

Choice D sounds more accurate. Because if your speaking to an audience slang words would be considered grammatical errors and in order for them to understand you should use proper English. Also I think if you use extremely formal words the audience might have a hard time understanding and processing the information, which might make the essay a little boring.

How long does your short story have to be? let me know.