Which of the following nutritional habits can increase susceptibility to a variety of diseases and health problems?

A) High-salt diets.
B) High-fat diets.
C) Low-fiber diets.
D) All of these.

All three nutritional habits can have negative effects on health. High-salt diets can lead to high blood pressure and cardiovascular disease. High-fat diets can increase the risk of obesity, type 2 diabetes, and heart disease. Low-fiber diets can lead to digestive problems, such as constipation, and increase the risk of certain types of cancer. Therefore, it is important to maintain a balanced and varied diet to promote optimal health.