There are lines where Black doggedly holds onto the c4 pawn. It's possible to get into an awful lot of trouble doing this, at the very least, White would get significant compensation for the pawn in the form of piece activity and the centre.
Obviously if Black could just take the pawn, hold it, and simply be a pawn up for nothing vs best play, the queens gambit would be almost refuted.
The normal way the QGA is played is to use the time White is spending recapturing the pawn, to develop. More often than not, Black makes no attempt to hold onto the pawn.
If Blacks only goal is to hold on to the c4 pawn and white makes no opening mistakes, can black hold on to the c4 pawn? If yes, can anyone provide a list of moves (without sidelines) with the purpose of providing an example of being able to maintain the pawn on c4?