The correct answer is: Kashyapa Matanga.
Kashyapa Matanga was a Buddhist monk who is traditionally credited with introducing Buddhism to China in the 1st century CE. He is said to have brought Buddhist scriptures and images to China from India, and to have translated them into Chinese. He is also said to have founded the first Buddhist monastery in China, the White Horse Temple.
Nagarjuna was an Indian Buddhist philosopher who lived in the 2nd century CE. He is considered to be one of the founders of the Madhyamaka school of Mahayana Buddhism.
Samprati was an Indian emperor who ruled from 270 to 335 CE. He is said to have been a devout Buddhist, and to have built many Buddhist temples and monasteries.
Vasubandhu was an Indian Buddhist philosopher who lived in the 4th century CE. He is considered to be one of the founders of the Yogacara school of Mahayana Buddhism.
In conclusion, the correct answer is Kashyapa Matanga. He is traditionally credited with introducing Buddhism to China in the 1st century CE.