The risk of death from cardiovascular disease is substantially increased among those with

A) symptoms of depression.
B) Type B personalities.
C) NK cells.
D) B lymphocytes.

Research has shown that depression is associated with an increased risk of cardiovascular disease and mortality. Depressed individuals have higher levels of inflammation and oxidative stress, which can contribute to the development of cardiovascular disease. Additionally, depression can lead to poor health behaviors, such as smoking and lack of exercise, which further increases the risk of cardiovascular disease. Type B personalities, NK cells, and B lymphocytes have not been consistently linked to an increased risk of cardiovascular disease or mortality.