a) They sent a runner to Athens to tell them of the victory and he said, "Victory is ours!" and then died of exhaustion is your answer.
The Battle of Marathon was well known, because while Athens was able to beat the much stronger Persian army, it was also where the term "marathon", and the event that "marathon" is used to describe was born.
The runner that they sent ran non-stop (typical of a marathon) from the battle field to Athens to deliver the news of victory. However, after getting there & delivering the news, he died, possibly from exhaustion.
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Answer:
The Crisis of the Third Century, also known as Military Anarchy or the Imperial Crisis (235–284 AD), was a period in which the Roman Empire nearly collapsed under the combined pressures of barbarian invasions and migrations into the Roman territory, civil wars, peasant rebellions, political instability (with multiple usurpers competing for power), Roman reliance on (and growing influence of) barbarian mercenaries known as foederati and commanders nominally working for Rome (but increasingly independent), plague, debasement of currency, and economic depression.
The Crisis of the Third Century, also known as Military Anarchy or the Imperial Crisis (235–284 AD), was a period in which the Roman Empire nearly collapsed under the combined pressures of barbarian invasions and migrations into the Roman territory, civil wars, peasant rebellions, political instability (with multiple usurpers competing for power), Roman reliance on (and growing influence of) barbarian mercenaries known as foederati and commanders nominally working for Rome (but increasingly independent), plague, debasement of currency, and economic depression.
Rapidly increasing population
Cultural Regions and Spoken-Languages in Europe: There are multiple languages spoken within each cultural region of Europe.