Who has become the youngest woman ever to be included on Forbes most powerful list?

Who has become the youngest woman ever to be included on Forbes most powerful list?
[A]Taylor Swift
[B]Sofia Vergara
[C]Oprah Winfrey
[D]Mary Barra

Taylor Swift
US based singer Taylor Swift has become the youngest woman ever to be included on Forbes most powerful list. She was ranked 65 on the Forbes most powerful list 2015. Swift is a seven time Grammy winner. The next youngest on the list is Elizabeth Holmes (no.72) founder and CEO of innovative blood-testing company Theranos. Reference