The correct option is C Advaita Vedanta
Shankaracharya was an early 8th century Indian philosopher who consolidated the doctrine of Advaita Vedanta. It is a Hindu philosophy which focuses on Brahman, atman, vidya (knowledge), avidya (ignorance), maya, karma and moksha. It refers to the idea that the soul or Atman is the same as Brahman. It has roots in the oldest Upanishads.