What type of violation could result in points being added to a JOL holder's record?

The correct choice indicates that both failure to signal and a seatbelt violation can each lead to points being added to a JOL (Junior Operator License) holder's driving record.

In Massachusetts, the point system is designed to penalize drivers for various violations, with different infractions carrying specific point values. Failing to signal is considered a traffic violation that compromises safety by not communicating intentions to other road users, thus resulting in points being assessed against the driver's record. Similarly, a seatbelt violation is also significant in promoting safety; when a driver or passenger is not wearing a seatbelt, it is a breach of Massachusetts law, which further leads to points accumulation.

Consequently, both infractions underscore the importance of adhering to traffic laws meant to enhance safety on the road, which is why they are subject to the point system for JOL holders.