I believe your answer would have to be A. " he"
The best answer to the question that is being stated above would be that 'Writing is difficult.' The works of Edgar Allan Poe and Stephen King entitled 'The Philosophy of Composition' and 'On Writing', respectively, tells the main idea that you being a writer and writing is a very difficult thing to do and takes time and effort to pull off.
It has a great based, yet we want it to be more formal. A good example would be “Hello “teacher”,
I do apologies for my response in today’s attendance question response. It was not to be targeted towards you, but to my brother who has a tendency to correct me a lot. I appreciate you as a teacher and I have no issue with you correcting me on proper grammar usage.”