The amount of goods and services created in a given period of time

The correct answer is:

Aggregate Output

In Economics, The Aggregate Output is defined as the total quantity of goods and services produced by an economic system during a given period of time. This means that the aggregate output is an economy's total productivity, which goes hand to hand with the GDP, with GDP acting as the practical application of the theory of aggregate output.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

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