Use This Case to Answer the Follwing Questions:
During a Discussion

Use this case to answer the follwing questions:
During a discussion of RBC indices, a medical technologist of Cambodian origin mentioned that her own red cells were small in a CBC per?formed two years earlier in a routine physical. A more recent CBC showed the following results.
$\begin{array}{ll}\text { TEST } & \text { RESULTS } \\\text { WBC } & 9.3 \times 10^{9} / \mathrm{L} \\\text { RBC } & 6.11 \times 10^{12} / \mathrm{L} \\\mathrm{HGB} & 13.0 \mathrm{~g} / \mathrm{dL} \\\mathrm{HCT} & 41.8 \% \\\text { MCV } & 69.6 \mathrm{fL} \\\text { MCH } & 22.5 \mathrm{pg} \\\text { MCHC } & 31.0 \mathrm{~g} / \mathrm{dL} \\\mathrm{RDW} & 15.8 \\\mathrm{PLT} & 351 \times 10^{9} / \mathrm{L}\\\text { Differential }& \text { Within normal limits }\\\end{array}$
-What reflex test is most appropriate to investigate these results?

A) Hemoglobin electrophoresis and iron studies
B) Bone marrow aspirate
C) Vitamin B?? and folate assays
D) Cytogenetic analysis