Which of the Following Statements Best Describes How Lateral Flow

Multiple Choice

Which of the following statements best describes how lateral flow assays demonstrate the presence of bacterial,fungal,and viral antigens?

A) During the assay, bacterial antigens present in a specimen are pretreated by coating them with colloidal gold prior to binding to an antibody.
B) A positive test results from the binding of the conjugated antibody and antigen to a fixed antibody directed against the antigen in the capture zone.
C) A positive test results from the precipitation of the antigen-antibody complex in the capture zone.
D) Migration of labeled antigen to the capture zone produces a positive result.