Patient Serum Is Mixed with Gel Particles That Have Been

Patient serum is mixed with gel particles that have been sensitized with Treponema pallidum antigens as well as with unsensitized gel particles in a separate well.Agglutination was observed in the well with sensitized gel particles but not in the well with unsensitized gel particles.What is the interpretation of these results?

A) Positive for anti-T pallidum antibodies
B) Positive for heterophile antibodies
C) Negative for anti-T pallidum antibodies
D) Negative for anticardiolipin antibodies