Why Is Glucose Typically Not Considered to Be an Analyte

Multiple Choice

Why is glucose typically not considered to be an analyte suitable for delta-check monitoring?

A) Glucose methodology does not provide sufficiently reproducible results.
B) Glucose tests are ordered too frequently.
C) Glucose shows pronounced intra-individual variation.
D) Glucose levels can be measured in serum, plasma, urine, and spinal fluid.