It could be argued that "b. A shepherd who moves his herds in search of fresh pasture," would be most similar to the Mongols' before Ghenghis Khan, since many of the Mongols during this time were nomadic and pastoral.
30 were carried off and then 27 of them died
The correct answer is b I hope that this helps
About 10 years, however the economy was in trouble again because shirtly after the WW2 happened