In E. coli, ____ bound to large ribosomal subunits facilitates transfer to ____ to bind ____ residues, thus avoiding non-productive folding.

A) chaperonin; trigger factor; H-binding
B) trigger factor; DnaK; hydrophobic
C) DnaK; Hsp70; ionic
D) Hsp70; chaperonin; hydrophilic
E) all are true