Which of the following sentences properly uses a semicolon to join two independent clauses?

a) Elvis Presley was known as the King of Rock & Roll; he was also known for his; generosity and kindness.
b) Elvis Presley was known as; the King of Rock & Roll, he was also known for his generosity and kindness.
c) Elvis Presley was known as the King of Rock & Roll. He was also known for his; generosity and kindness.
d) Elvis Presley was known as the King of Rock & Roll; he was also known for his generosity and kindness.

d) Elvis Presley was known as the King of Rock & Roll; he was also known for his generosity and kindness.