The soil in this part of the world is not rich enough to ________ a large population.
句意：这一地区的土壤不够肥沃，不足以养活一大群人。本题考查单词词义，sustain维持；支撑， 承担。compromise妥协，和解。compound化合物；混合物；复合词。survive幸存；生还。结合句意，选择 C。