Why might shakespeare use thy or thee rather then you in a characters speech what might be the purpose of change in wording

I had this same question and this was the correct
Thee, Thou, Thy and Thine (You and Your)
It’s a common myth that Shakespeare never uses the words “you” and “your” – actually, these words are commonplace in his plays. However, he also uses the words “thee / thou” instead of “you” and the word “thy / thine” instead of “your”. Sometimes he uses both “you” and “thy” in the same speech. This is simply because in Tudor England the older generation said “thee” and “thy” to denote a status or reverence for authority. Therefore when addressing a king the older “thou” and “thy” would be used, leaving the newer “you” and “your” for more informal occasions. Soon after Shakespeare’s lifetime, the older form passed away!

Ibelieve the answer is b.