C. It uses deeply religious content.
Answer:
The implicit detail is : "in another language"
Explanation:
This is because implicit means it doesn't say something in the text directly. We know that this means that Jilly didn't understand the math, however, the text didn't directly say that.
The correct sentence is, "After taking the test, I felt bad". The other two sentence had an incomplete structure as it only ended with an adverb.