African americans experience· , which tends to increase· blood· pressure . 1. a diet higher in salt· than european americans 2. a diet lower in fat· and higher in fiber· 3. larger and more cohesive families 4. discrimination· based on skin· color· 5. a stress-diathesis based on their genes

"African Americans experience a stress-diathesis based on their genes, which tends to increase blood pressure."

Stress-diathesis indicates that there is a vulnerability, in this case, based on their genes. It is true that African Americans may experience also a high rate of diabetes and obesity which may influence such condition on the blood pressure, but it is also known that they have a gene that increases the impact of salt intake on the blood pressure.