Which of the Following Is True About Semistarvation

Which of the following is true about semistarvation?

A) Impairment does not occur if there are no clinical symptoms.
B) Often the first sign that tissues are being affected is a biochemical change that may be detectable by a blood test.
C) Physical symptoms often appear before evidence of biochemical changes.
D) Action to correct undernutrition should only be taken when clinical symptoms are detected.