Read the passage below and choose the correct word for each blank.
The rapid adoption of digital tools has revolutionized the field of education. Online platforms, interactive modules, and virtual classrooms have made learning more accessible and (1)____ for students around the world. These technologies allow learners to progress at their own pace, revisit difficult concepts, and explore subjects beyond traditional syllabi. However, digital learning also brings certain challenges. Not all students have equal access to reliable internet or digital (2)__, which creates a significant learning gap. Moreover, prolonged screen time and lack of real-world interaction can affect both physical health and social development. To address these issues, institutions must adopt a blended approach—one that combines the flexibility of digital content with the structure of face-to-face learning. Teachers must also be trained to effectively integrate technology into the classroom, ensuring that it enhances rather than (3)__ the learning process. When used responsibly, digital education has the potential to (4)__ barriers and bring quality instruction to even the most remote corners of the world. But for it to be truly effective, students must stay disciplined, motivated, and (5)____ in their learning journey.
(4)
Show answer & explanation
Correct answer: C
Explanation
The sentence explains how digital education can help people in the "most remote corners of the world."
In English, when something overcomes an obstacle or a limitation (like distance or cost), we use the idiom to "break barriers."
Digital education removes the physical and geographical walls that used to stop people from learning.
(A) and reinforce (B) would mean making the barriers even harder to cross, which is the opposite of what technology does. Challenge (D) is a possible verb, but it doesn't quite fit the idiomatic "bringing instruction to remote corners" as well as "break" does.