Select correct answer.

Piper said: "I had graduated from university a year before I decided to become a singer in 2002."

Piper said that she had graduatedfrom university a year before she decided to become a singer in 2002.

Piper said that she had graduated from university a year before she decided to become a professional singer in 2002.

A year before 2002 is 2001 - a specific time in the past, so the tense does not change in the indirect speech sentence.

Piper said that she had graduated university a year before she decided to become a professional singer in 2002.

Piper's decision of becoming a singer happened in 2002 so it is a completed action. The past simple tense stays the same in the indirect sentence.