A. imposed reasonable price caps B. beat down the door of federal regulators C. urged the federal authorities to take action D. struggled against federal policy to hike prices 参考答案:C 答案解析:[解析] 题干的意思是:“为了有助于抑制价格的进一步上涨,加州的个人和团体干了些什么”,从全文特别是第一段可以判断,他们敦促联邦当局采取措施,故选C。