Explanation:

- Option 1: DACB

- Starts with a conditional statement about technology not fully replacing traditional methods.

- Moves on to how technology aids learning through training.

- Ends by discussing both the rapid growth of technology and teachers' responsibilities.

- Concludes with a statement about technology's limitations.

- Option 2: BADC

- Begins with a general statement on how fast technology is evolving.

- Follows this with its role in developing oral and aural skills, complementing classroom teaching.

- States technology can't fully replace traditional teaching methods.

- Concludes by emphasizing teachers' roles in guiding students.

- Option 3: BCDA

- Like Option 2, it starts by talking about technology's growth.

- Continues with how it can't fully substitute traditional teaching.

- Then emphasizes teachers’ responsibilities.

- Ends with its role in skill development.

- Option 4: ACBD

- Starts by describing training benefits.

- Moves to technology's growth.

- Ends by discussing limitations and teachers’ roles.

Option 2 (BADC) makes the most logical flow of ideas from the role and growth of technology, to its educational benefits and limitations, ending with a teacher's role.