Which option would likely solve problems accessing certain websites on a public library's WiFi?

Using a VPN would likely be the best solution for accessing certain websites on a public library's WiFi. Public networks often implement restrictions on certain types of traffic or websites, which can prevent users from accessing specific content. A VPN, or Virtual Private Network, creates a secure and encrypted tunnel for your internet traffic, effectively bypassing these restrictions. By masking your IP address and routing traffic through a different server, the VPN can help you access blocked or restricted websites.

When utilizing a VPN, the encryption also enhances your privacy and security while connected to a public network, where data interception could be a concern. This aspect makes VPNs particularly useful in environments like libraries, where multiple users share the same network and access points.

While other options, such as checking for proxy filters or changing device settings, might address some accessibility issues, they often do not provide the comprehensive solution that a VPN does, especially in overcoming restrictions and enhancing privacy on public WiFi networks.