As Europe’s economy has soured, free-market ideas face new chall

As Europe’s economy has soured, free-market ideas face new challenges.
A、developed
B、changed
C、worsened
D、grown
【正确答案】：C
【题目解析】：句意：随着欧洲经济的恶化，自由市场思想面临着新的挑战。​sour在这里意为”恶化“；develop发展，开发；change改变；worsen恶化，变坏；grow发展，生长；故选C。