Sanghabhuti was a prominent Buddhist scholar known for his work on the Sarvastivada school of Buddhism, particularly their Vinaya texts. Vinaya texts focus on monastic rules and discipline.  He traveled to China to translate these texts, making them accessible to Chinese Buddhists.

Let's look at the other options:

• Prajnaparamita Sutra: These sutras are central to Mahayana Buddhism and focus on the concept of 'emptiness' (sunyata). While important, they are not primarily associated with Sanghabhuti's work.

• Visuddhimagga: This text, meaning 'Path of Purification,' is a comprehensive Theravada Buddhist treatise written by Buddhaghosa, not Sanghabhuti.

• Lalitavistara: This Mahayana sutra narrates the life of the Buddha and is not directly linked to Sanghabhuti's scholarship.