Answer:
to make sure the claim is clear and precise is an important strategy
"Informal communications are more easily misinterpreted"
A formal tone provides the reader with a better understanding of the message sent because it lacks the everyday slangs or cultural characteristics in informal language that may sound alien to the receiver, considering many people doesn't know the meaning of some words used informally. A misinterpreted message on any business and in professional environment is an important issue to worry because most of the time it implicates in errors and failure on the tasks given to the worker.
C
mailman should not be capitalized
Form good habits, know that you can still accomplish something despite the fact that there are several reasons not to or why you "can't", and know how to form good self-discipline for success.
The answer would be letter D: A sense of accomplishment mixed with a feeling of regret.
While growing up people live their life based on different decisions made through it. People take risks and drove their life the way they want but at the same time there are lots of risks people don't take. That is a resume of how life goes. Based on this, in the older years people start to realize all they accomplished through life, where they are standing and how much effort that took, but at the same time, with all of these accomplishment older people tend to think "What if", based in all the decisions or risks they never took. This brings in them a mixed sense of regret of things they never did and accomplishment of those they did.