Answer:
Samarkand has long been a central point for trade across the region, and was a substantial city renowned for its craft production, with a citadel and strong fortifications, several centuries before it was conquered by Alexander in 329 BC.
:
The correct answer is: an extreme political ideology.
Indeed, the movement’s ideology was a very dogmatic blend of several ideologies and outlooks. They were heavily Stalinist and Maoist in their leftism; extremely xenophobic against both foreigners and national non-Khmer minorities and extremely agrarian.
With regards to their Stalinist/Maoist outlook they believed in absolute obedience to the party and its leaders, with a set of inviolable strict rules and laws and the belief that the ends justified any means.
They loathed national minorities as they saw them as a stain on their national Khmer purity and they despised foreigners because they refused to ever be colonized again, whether by Westerners or Asians.
They also considered that urban, capitalistic society was a disease and sought to eradicate it by eradicating its people.
A. They meant to punish the Massachusetts colonists for throwing there tea shipment into the Boston Harbor in reaction to changes in tax by the British to the detriment of Colonial goods.
Hope this helps:)
Number 18 would be "D".
Number 19 would be "A".
Number 20 would be "C".
Number 21 would be "C".
Number 22 would be "D".
Number 23 might be "C" I'm not sure, lol.