The correct option is A Vishistadvaita
The Vaishnavite saint, Ramanuja, who lived in the 11th century, propounded a belief system called 'Vishistadvaita'. The philosophy itself is considered to have existed long before Ramanuja's time. He added to this line of thought by expounding the knowledge expressed in the Upanishads, Brahma Sutras and Bhagavad Gita.