Final answer:
The appropriate fill-in for the blank is 'Changes,' as it refers to any modifications to the exhibit that need to be communicated through the exhibit transmittal form.
Step-by-step explanation:
The correct answer to the question 'Any __ in regards to the exhibits can be added to the exhibit transmittal form' is option B) Changes. This is because in a typical exhibit transmittal form process, updates about exhibit changes such as modifications, additions, or removals of items are important to communicate to ensure accuracy and proper tracking. Hence, if there are any alterations to the original plan or content of the exhibits, noting these in the transmittal form is essential for all stakeholders involved.