想请教一下TPO19的阅读第一篇

CJX112UID: 3523131

Paragraph 3: Each soldier received his pay, but in regions without a developed economy there was initially little on which it could be spent. The pool of excess cash rapidly stimulated a thriving economy outside fort gates. Some of the demand for the services and goods was no doubt fulfilled by people drawn from far afield, but some local people certainly became entwined in this new economy. There was informal marriage with soldiers, who until AD 197 were not legally entitled to wed, and whole new communities grew up near the forts. These settlements acted like small towns, becoming centers for the artisan and trading populations.
8.According to paragraph 3, how did the soldiers meet their needs for goods and services?
O         Their needs were met by the army, and all of their economic transactions took place within the fort.
O         Most of their needs were met by traveling tradespeople who visit the forts.
O         During their days off, soldiers traveled to distant towns to make purchases.
O         They bought what they needed from the artisans and traders in nearby towns.
这道题，我怎么都觉得是选B，但是答案是D，可是文中不是说是people drawm from far afield么，难道不就是traveling tradespeople么？困惑...

andrewguoUID: 3522120

那些traveling tradepeople can not visiting the forts. 原文中说道stimulated a thriving economy outside fort gates. 注意outside fort gates