What are some common reasons for TLC license suspension?

The reasons for suspension of a TLC license are significantly related to the responsibilities and standards expected of drivers in the for-hire vehicle industry. Failing to maintain insurance is critical, as it ensures that both the driver and passengers are protected in case of accidents. Unsafe driving puts not only the driver at risk but also the passengers and others on the road, leading to potential accidents and harm. Criminal activity is a serious concern, as it undermines public trust and safety; drivers are expected to adhere to legal standards and maintain a clean background to ensure safety for all passengers.

The other options, while they may touch on relevant aspects of a driver's responsibilities, do not accurately reflect valid reasons for TLC license suspension. For instance, safe driving and good customer ratings would actually contribute to maintaining a license rather than risking suspension. Working for multiple companies could be permissible as long as it doesn't conflict with specific company policies and regulations, and non-compliance with vehicle registration is more related to vehicle legality than direct TLC license compliance. Thus, the comprehensive nature of the issues listed in the correct answer emphasizes their importance in maintaining the integrity and safety of the for-hire vehicle industry.