Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks.

ChatGPT: New AI chatbot has everyone talking to it

A new chatbot has passed one million users in less than a week, the project behind it says. ChatGPT was publicly released on Wednesday by OpenAI, an artificial intelligence research firm (5)______ founders included Elon Musk. ChatGPT is the latest in a series of AIs which the firm refers to as GPTs, an acronym which (6)______ for Generative Pre-Trained Transformer. To develop the system, an early version was fine-tuned through conversations with human trainers. The system also learned from access to Twitter data according to a tweet from Elon Musk who is no longer part of OpenAI's board. The Twitter boss wrote that he had paused access "for now". The results have impressed (7)______ who've tried out the chatbot. OpenAI chief executive Sam Altman revealed the level of interest in the artificial conversationalist in a tweet. The project says the chat format allows the AI to answer "follow-up questions, admit its mistakes, challenge incorrect premises and reject inappropriate requests". A journalist for technology news site Mashable who tried out ChatGPT reported it is hard to provoke the model into saying offensive things. (8)______, OpenAI warns that "ChatGPT sometimes writes plausible-sounding but incorrect or nonsensical answers". Training the model to be more cautious, says the firm, causes it to decline to answer questions that it can answer correctly. Briefly questioned by the BBC for this article, ChatGPT revealed itself to be a cautious interviewee (9)______ of expressing itself clearly and accurately in English.

(https://www.bbc.com/news/technology)