Which Bhakti Saint propounded Suddhadvaita Vedanta (Pure non-dualism) and philosophy called Pustimarga (the path of grace)?

Q. Which Bhakti Saint propounded Suddhadvaita Vedanta (Pure non-dualism) and philosophy called Pustimarga (the path of grace)?

A.            Ramanuja

B.            Ramananda

C.            Vallabhacharya

D.            Narasi

Answer: Vallabhacharya