List three ways in which keynesians would help spur the economy

The way to break the cycle, said Keynes, is to pump government spending into the economy by building roads and bridges and other public works. ... Keynes argued that aggregate demand determines the level of economic activity. If demand falls short, it leads to recession and high unemployment.

Explanation:

the answer is jerusalem

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).