The Origins of Old English

In old english before the e and the i, it didn't always make that change. Sometimes the k sound was retained. So in some cases that c had shifted to a c h sound,. In a few other cases it had retained its original k sound. But then there were all of those words that had come in through french where the c was now pronounced as an s sound. Words like c, e, n t which were being pronounced as son and eventually anglicized to scent.