When is it permissible to use a handheld device while driving a bus in Ontario?

Answer: C — It is not permissible at any time

Using a handheld device while driving a bus in Ontario is strictly prohibited at all times, which makes this answer correct. This regulation is in place to ensure the safety of passengers, other road users, and the driver. The use of handheld devices can significantly distract drivers, increasing the risk of accidents and endangering lives. Maintaining focus and attention while operating a vehicle, particularly one that carries passengers, is paramount. Laws in Ontario reflect this principle, emphasizing that any engagement with a handheld device diverts attention from the task of driving, which is why there are no exceptions to the rule. Understanding this regulation is vital for bus drivers to promote safe driving practices and uphold the law.