Which of the following may lead to a loss of your driver's license?

Suspension from another state can indeed lead to a loss of your driver's license in your home state. Each state has the ability to impose penalties for violations committed in other jurisdictions, which means that if your driver's license is suspended in one state, other states may honor that suspension. This usually occurs through a process known as "interstate compact," where states share information about driving offenses and license statuses. As a result, if you are found to have a suspension from another state, it can impact your driving privileges in your current state, leading to potential loss of your driver's license.

Changing your address typically does not result in a loss of your driving privileges, but rather requires you to update your information with your local Department of Motor Vehicles. Taking a voluntary driving course is generally a proactive measure that may help improve driving skills, and it is often not associated with losing one's license. Moving to another country may affect your ability to use your license in the new location but does not directly cause a loss of the license itself unless you fail to address any local regulations about foreign drivers.