Answer:~At the center, information about tides and currents was collected, more accurate charts and maps were drawn, techniques for determining longitude were improved, and new ship designs (such as the caravel) were developed
Vladimir converted his people to Eastern Orthodox Christianity because the choice cemented ties with Byzantium.
<h3>What is the
Orthodox Christianity?</h3>
This religion believed their form of Christianity is correct while the teachings of Catholicism and Protestantism are wrong
He rejected the Roman Catholicism in order to avoid the papal influence that came with the religion.
Hence, he converted his people to Eastern Orthodox Christianity because the choice cemented ties with Byzantium.
Therefore, the Option A is correct.
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