1) preserved Greco-Roman culture
Justinian established the Corpus Juris Civilis (Body of Civil Law), which codified and organized the system of laws for the empire. Justinian ruled as emperor in the Eastern Roman Empire (which we now call the Byzantine Empire) from 527 to 565 CE. The "Justinian Code" of laws codified and preserved Roman law into the Middle Ages. The culture and values of Greco-Roman tradition were embodied in these laws.
The excerpt from theJustinian Code shows how the Byzantine Empire by preserved Greco- romanculture, the answer is number 1. Thank you for posting your question here. I hopethe answer helps.
The saving borrowing-investing cycle is certain ways in witch people can use their money when they save it you can place it in your'e bank account or other depository institutions, Borrowing money would consist of loans from banks or other entity's and at last thats when they can use that capital to invest in their future and certain needs witch would than bring more money but some investments can be a risk or sometimes fluctuate.