The Harrison Drug Act of 1914 primarily aimed to:

The Harrison Drug Act of 1914 primarily aimed to restrict the use of addictive drugs, which is reflected in the chosen answer. This piece of legislation marked a significant shift in the regulation of drugs in the United States, focusing on controlling substances that were seen as harmful to public health. The Act established strict regulations concerning the distribution and use of opiates and coca products, requiring anyone dealing in these substances to register, pay a tax, and maintain specific records.

This legislation was a response to growing concerns about drug addiction and its impact on society during that period, particularly with the rise of opiate use. By implementing these restrictions, the Act aimed to reduce the availability of these dangerous substances and encourage more responsible use under medical supervision.

In this context, it becomes clear that the other choices do not accurately reflect the primary intent of the Harrison Drug Act. While the regulations did involve aspects of drug promotion and control, their central focus was indeed on combating the misuse of addictive drugs, aligning with the public health objectives of the time.