Final answer:
It is true that students should use Blackboard's internal 'Course Messages' to communicate with their instructors, and only use the instructor's MDC email for technical difficulties.
Step-by-step explanation:
The statement is True. When sending messages to your instructor, it is advised to use Blackboard's internal 'Course Messages' rather than your instructor's MDC email. This is because Blackboard's internal messaging system is specifically designed for communication within the course, allowing for easy access to course materials and discussions. The use of the instructor's MDC email should be reserved for technical difficulties when access to the course is not possible.