根据给定资料反映出的问题，以某市“精神文明建设办公室”的名义，围绕“网络文明建设”，给广大网民写一封公开信。 要求：联系实际，条理清晰，具有感召力，语言简洁流畅，800—1200字。

The cash conversion cycle is the:（）

A. sum of the time it takes to sell inventory and the time it takes to collect accounts receivable.

B. length of time it takes the firm to pay the credit extended to it for purchases.

C. sum of the time it takes to sell inventory and collect on accounts receivable, less the time it takes to pay for credit purchases.