I have a lot to say. I'm not sure what you have already heard at this point. You wish to connect these two sentences into a sentence containing a dependent clause and and independent clause. Which of these choices would work for this purpose? A) I have a lot to say; I'm not sure what you have already heard at this point. B) I have a lot to say, but I'm not sure what you have already heard at this point. C) I have a lot to say, and I'm not sure what you have already heard at this point. D) Although I have a lot to say, I'm not sure what you have already heard at this point.