After the robbery, the shop installed a sophisticated alarm syst

After the robbery, the shop installed a sophisticated alarm system as insurance______ further losses.
A、for
B、from
C、against
D、towards
【正确答案】：C
【题目解析】：insurance against以防…而投的保险。句意：抢劫案发生后，这家商店安装了一套精密的报警系统，以防进一步的损失。