Question

A reason that Christian churches in Rome and Constantinople began to diverge was they could not agree on

whether to hold services in Latin or Greek.
whether to preserve the writings of Greek scholars.
what to do to stop the spread of persistent plague.
how best to offer religious education services.

Answer 1

whether to hold services in Latin or Greek.

The language difference (Latin in the West, Greek in the East) was a major cultural and liturgical divide that contributed to misunderstandings and the growing split between Rome and Constantinople.