Read the passage and answer the following questions.

India’s nationwide COVID-19 immunization drive, which aimed for unprecedented scale, encountered complex operational roadblocks, public skepticism, and administrative hurdles. Managing a rollout across a massive population demanded distributing doses amidst fluctuating inventories, disparate regional health facilities, and mixed public reception. Initially, vaccine allocation was noticeably unbalanced, favoring major urban centers over rural, hinterland regions. This disparity stemmed from top-down administrative controls as well as logistical barriers, such as inadequate cold-chain storage facilities outside major cities. In isolated zones, power outages, scarce refrigeration, and rough terrain severely constrained safe transport and storage. Simultaneously, vaccine hesitancy escalated as misinformation spread via social media platforms, heightening anxiety regarding adverse effects and government motives, particularly in regional dialects. The introduction of the CoWIN portal served as an essential digital platform for booking, yet it created an inadvertent barrier for individuals without smartphone devices, internet connectivity, or tech literacy, thereby worsening digital inequality. Eventually, strategies adapted by granting states greater autonomy, partnering with local grassroots leaders to build confidence, and deploying mobile clinic units to remote communities. Concurrently, indigenous production efforts—led by vaccines like Covishield and Covaxin—ensured supply self-sufficiency while enabling international distribution under the "Vaccine Maitri" initiative. Ultimately, the national effort demonstrated massive operational capability while highlighting that long-term success hinges on equitable access, robust infrastructure, and community trust in a digitally stratified nation.

Which of the following describes a key unintended consequence associated with the implementation of the CoWIN platform?