Abatacept Exerts Its Antirheumatic Effects by Binding to Which Molecular

Abatacept exerts its antirheumatic effects by binding to which molecular target?

A) interleukin-1 type I receptor
B) tumor necrosis factor-α
C) cell surface proteins of T lymphocytes
D) immunoglobulin G rheumatoid factor
E) interleukin-2 transcription factors