Final answer:
A 30 y/o male with a genetic predisposition to AAA is most likely to develop an abdominal aortic aneurysm.
Step-by-step explanation:
The client who would be most likely to develop an abdominal aortic aneurysm is a 30 y/o male with a genetic predisposition to AAA. Age is a significant risk factor for developing cardiovascular disease, and although abdominal aortic aneurysms can occur in both males and females, they tend to be more common in older males. Genetics also play a role, and having a family history of cardiovascular disease increases the chances of developing an aneurysm.