Which of the following is TRUE/FALSE about weight loss? a) Psychiatric disorders are a major cause of involuntary weight loss. b) Up to 20% of all cancer deaths are caused directly by cachexia. c) Connective tissue diseases decreases metabolic demand. d) Hypehyroidism in the elderly have more prominent sympathomimetic features. e) Involuntary weight loss may be one of the earliest manifestations of Alzheimer's dementia.