Final answer:
Niacin deficiency is characterized by pellagra, which includes the symptoms of Dermatitis, Diarrhea, and Dementia. Without treatment, it can lead to death.
Step-by-step explanation:
Characteristics of Niacin Deficiency
The deficiency disease associated with niacin is called pellagra. It is characterized by the "3 Ds": Dermatitis, Diarrhea, and Dementia. These symptoms can present as skin inflammation, digestive upset, and cognitive impairments such as headache, forgetfulness, depression, and anxiety. Without treatment, pellagra can result in a fourth 'D' - Death. Therefore, the correct answer to the question "Which of the following statements characterizes Niacin deficiency?" is D. All of the above.