Choose the word (A,B,C or D) that best fits the blank space in the following passage

Choose the word (A,B,C or D) that best  fits the blank space in the following passage.
Nowadays, education is (23) _____ a lot with the help of technology and AI. Going to university or the library is not the only way for students to gain knowledge today. Through their computers and other (24) ____ devices, they can participate in lifelike simulated lessons anywhere. Students can even do all the (25) _____ online and get the results right away. In the (26) _____ , online learning will become an effective way for children as well. They can stay at home and have access to various classes through their computers. This kind of education is time-saving and cost-saving (27) _____ they don't have to use any vehicles to travel a long way to go to school. After the COVID-19 pandemic, online education has been the main option for many school all over the world. However, some students are (28) _____ about virtual learning because they like to communicate with others in real life.

23. A. change                  B. changes                         C. changing                    D. changed
24. A. electronic              B. electric                           C. electricity                    D. electrician
25. A. exam                    B. tests                               C. test                             D. text
26. A. present                 B. past                                C. now                            D. future
27. A. however               B. so                                   C. because                      D. although
28. A. delighted              B. excited                             C. happy                        D. disappointed