A Three- Year- Old Child Presents with Repeated Staphylococcal Skin

A three- year- old child presents with repeated staphylococcal skin infections that take a very long time to resolve. The total white blood cell count is within normal limits and counts of all white blood cell types are within normal limits. All immunoglobulin and complement levels are within normal limits. A nitroblue tetrazolium (NBT) test is performed, and at the end of incubation, all neutrophils appear yellow. What is the best interpretation of these data?

A) The child may have chronic granulomatous disease (CGD) .
B) All tests done to date are within normal limits and additional testing should be done.
C) The child may have cyclic neutropenia.
D) The child may have leukocyte adhesion defect (LAD) .
E) The child may have Job's syndrome.