Read the passage and answer the following question:
"The advent of digital technology has significantly
transformed the landscape of education. Online learning
platforms, virtual classrooms, and interactive resources
have become integral to contemporary teaching
methods. While these innovations offer numerous
benefits, such as increased accessibility and flexibility,
they also present challenges. For instance, the digital divide remains a significant barrier, with students from
underprivileged backgrounds often lacking reliable
internet access and technological devices. Educators
must navigate these complexities to ensure that the
advantages of digital learning are equitably distributed."
What is the primary challenge mentioned in the passage
regarding digital technology in education?