(单选题)France’s Carrefour is shedding most of its operation in the country, where big-box retailers are struggling to keep pace in a market whose shoppers are turning toward nimble delivery providers.
请判断该句的基本结构。
A、 主语+谓语动词+宾语(SVO)
B、 主语+系动词+补语 (SVC)
C、 主语+谓语动词 (SV)
D、 复杂句