[单选题]Choose the closest paraphrased version after the following sentence or the italicized part. Blacken the letter corresponding to your choice on the ANSWER SHEET.Since then, I've learned a great deal. One of the most important things I've learned is how much there is to learn, and how much I don't yet know.  A There is not much to be learned B I know the scope of my knowledge   C I am not clear about my own abilities D It's not important to know how much I've learned