해커스 리딩 파란색 109번 문제인데요 잘 이해가 안되서 글올려보아요.
하이라이트 된 부분은
However, as the military entered more and more foreign regions, patrol of the immense border became a difficult task that stretched human resources and prompted emperors to hire freelancers*, usually from Germany, who would be paid a reasonable salary and offered land in return for their sworn allegiance to rome.
Glossary- freelancers: a mercenary who rovieds military services to an army in exchange for a salary.
이고요.
보기 중에 제가 고르고 왜 틀렸는지 이해 안되는 보기는
A) Roman rulers were driven to hire professional soldiers by the need to police the Empire's borders.
정답은
C) The rulers began to employ salaried soldiers since the size of the territory made the edges vulnerable.
정답도 물론 틀린 부분은 없는 것 같지만 A)는 왜틀린건가요? 프로페셔날 솔져때문인건가요?