Final answer:
True. The correct answer is True. The # sign needs to be spelled out as 'Controlled substance C-I-a' when writing abbreviations.
Step-by-step explanation:
The correct answer is a. True. The '#' sign needs to be spelled out as 'Controlled substance C-I-a'. When writing out abbreviations, such as 'CIa', it is important to follow the proper conventions to ensure clarity and accuracy.