Which of the following is true about how bicyclists can ride on bike paths?

Bicyclists can ride two abreast on bike paths unless there are specific rules or signs indicating otherwise. This flexibility allows cyclists to ride side by side, which can facilitate conversation and camaraderie among riders, especially on less congested paths. However, riders should always remain aware of their surroundings and be courteous to others sharing the path, including pedestrians.

Other options suggest specific restrictions or conditions that are either overly prescriptive or not generally applicable. For instance, always riding single file is not a requirement unless the path is congested or there are signage restrictions. The stipulation about riding behind all pedestrians is not a standard rule; instead, cyclists should give pedestrians the right of way, but it does not mean they must always be behind them. Lastly, changing lanes freely is not advisable; cyclists should exercise caution and signal their intentions to ensure safety for everyone on the path.