What Was the Nature of the Sea Routes in the Asian

What was the nature of the sea routes in the Asian trading network?

A) Well-established routes directly crossing the major oceans were maintained from ancient times.
B) Most of the navigation was along the coastlines.
C) Only the Chinese and Arabs practiced navigation in the Asian trading network.
D) The only sea-going routes crossed the Indian Ocean from the Swahili ports of east Africa to India.