A manufacturing company would seek mezzanine financing in which of the following scenarios（）

A. A company preparing for an initial public offering.

B. A company ready for a major marketing campaign.

C. A company already producing and selling a product, seeking an initial expansion of operations.

为了兼顾保护的动作速度和测量精度，故障开始时用(_)算法为灵敏度较低而安全裕度较大的保护提供数据。

A、半周傅氏

B、全周傅氏

C、滤序器

D、移相器