What is the penalty for not completing the course within 30 days of registration?

The question asks about the penalty for failing to complete the course within 30 days of registration. Based on common practices for online courses with deadlines:

• a) You license will be suspended. This is a very severe penalty, usually reserved for serious violations, not typically for missing a course completion deadline unless the course is directly tied to maintaining a professional license and the deadline is absolute.
• b) You will be required to take this course in-person. While possible, it's less common than other penalties for online course non-completion.
• c) There is no penalty. This is highly unlikely for a course with a specified completion deadline.
• d) You must re-register and begin the course again. This is a very common consequence for not completing an online course within a set timeframe. It means losing access to the current enrollment and having to re-enroll (and often pay again) to restart the course from the beginning. The "Please Note" section also mentions "required to re-register" as a penalty for exceeding assessment attempts, which suggests re-registration is a mechanism used for penalties in this system.

Given these options, the most common and logical penalty for failing to complete an online course within a specified time limit is to have to re-register and start over.

The correct option is d).

$$\boxed{\text{d) You must re-register and begin the course again.}}$$