If an HIV-Infected Patient Has an Initial Negative Antibody Assay

Multiple Choice

If an HIV-infected patient has an initial negative antibody assay for HIV but demonstrates a positive polymerase chain reaction (PCR) result 10 days later,what is the most likely cause?

A) A false-negative result was caused by a technical error.
B) The antibody titer was too low to be detected by the original antibody assay.
C) The patient was in the window phase of the infection.
D) Both b and c