From the options given below, select the option which states the correct combination of incorrect/correct sentences.

A) He has also learned the Greek alphabet, capital and lowercase, and has begun to make the distinction between consonants and vowels.
B) Hardly they had spoken these words when the door opened and Arion himself stood before them.
C) It was About 450 million years ago since a meteor struck north-central Oklahoma, creating an impact crater - an astrobleme - more than eight miles wide.