A 74-year-old client who is a vegetarian has a hemoglobin of 10.2 gm/dL, vitamin B12 of 68 pg/mL (normal: 200-900 pg/mL), and MCV of 110 cubic micrometers. The nurse interprets these data and instructs the client to
a) Ingest a diet higher in vitamin B12 sources.
b) Continue with the diet but include more sources of iron.
c) Change the vegetarian diet and begin to eat red meat.
d) Supplement the diet with vitamin B12.
Answer: Supplement the diet with vitamin B12.