Answer:
D. Formal diction
Step-by-step explanation:
Formal diction is a style of speaking or writing in a polite, and proper manner. This type of diction often contains descriptive, precise and elegant words, and longer sentence and it is totally free of idioms, colloquialism, slang, and contractions. "I found no severe trial in my departure" is an example of this type of diction as it uses more formal and elegant words such as "severe trial" and "departure", instead of saying it a more informal way like: "I had no problems when leaving" or "I left with no trouble".