Final answer:
BiP binds substrates along with chaperones and co-chaperones to ensure protein quality control by aiding proper protein folding and assembly.
Step-by-step explanation:
BiP binds substrate in complex with specialized chaperones and co-chaperones. The role of this complex is protein quality control. Chaperones assist in the folding and assembly of proteins, ensuring they achieve their correct three-dimensional conformation. Co-chaperones play supporting roles, often regulating the function or targeting of the chaperones. Therefore, the correct answer is D) Chaperones, co-chaperones; protein quality control.