Final answer:
The 2012 study revealed that hackers and individuals who click on suspect links were most often the cause for privacy incidents.
Step-by-step explanation:
The 2012 study mentioned in the question revealed that different groups were most often the cause for privacy incidents. The study found that hackers were a major cause of privacy incidents, as they gained unauthorized access to personal information through website security breaches. Additionally, the study showed that individuals who clicked on suspect links in emails also put their personal information at risk. It's important to be cautious online and take steps to protect your privacy.