Under is the prepositional phrase. Remember prepositional phrases show location. Under ins the only word that does that. Good luck my man.
The answer would be C, I hope I helped ! :)
(p.126, The African American and the Settling of the West, Sarah Nichols and Marie Hernandez, ed.Aaron Wilds.)
Answer:
Use simple and succinct words instead of long-winded ones. Business letters need to be pithy; this can be achieved by making use of clear and concise words, short sentences, and crisp paragraphs. Be direct: Your reader is a busy professional, so come straight to the point in your letter without beating around the bush.
Explanation: