(A), (B), (C)의 괄호 안에서 어법에 맞는 표현으로 가장 적절… | [법원직 9급 영어] 21년 1회차 기출문제 상세 페이지

(A), (B), (C)의 괄호 안에서 어법에 맞는 표현으로 가장 적절한 것은?
Looking back, scientists have uncovered a mountain of evidence (A)[that / what] Mayan leaders were aware for many centuries of their uncertain dependence on rainfall. Water shortages were not only understood but also recorded and planned for. The Mayans enforced conservation during low rainfall years, tightly regulating the types of crops grown, the use of public water, and food rationing. During the first half of their three-thousand-year reign, the Mayans continued to build larger underground artificial lakes and containers (B)[stored / to store] rainwater for drought months. As impressive as their elaborately decorated temples (C)[did / were], their efficient systems for collecting and warehousing water were masterpieces in design and engineering.
*rationing 배급

(A) (B) (C)

that --- to store --- were

what --- stored --- did

that --- to store --- did

what --- stored --- were