Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

In recent years, artificial intelligence (AI) has been widely applied in various fields, including healthcare, finance, and education. AI systems are now (18) _______ . Despite these advancements, there are still concerns about the ethical use of AI, particularly in (19) _______ .
Many organizations are adopting AI technologies (20) _______ . These technologies have the potential to transform industries, but experts emphasize that AI should complement human abilities rather than replace them.
For example, in education, AI can (21) _______ , allowing teachers to focus on other important aspects of teaching. However, it remains crucial that AI (22) _______ .