It is d because people couldn’t find out if it was true or not
Because its referring to you. And when you refer to someone or yourself you capitalize. Its also part of a proper noun.
Answer:
sorry bro just here for the points but i hope your having a great day/night! lol
A:Netherlands B: Belgium C:Germany D: Luxembourg E: France F: Liechtenstein G: Hungary H: Switzerland I: Austria J: Andorra K: Italy L: Slovenia M: Monaco N: Vatican city i hope this could help