The Process of Decision Making in Chess Volume 2: Practice positions and solutions. Position 11.5

Solve the challenge below:

Diagram 11.5- black observed a big weakness on c6. That weakness can function as an outpost for the f3 knight in two moves or even for the c1 rook in some variations.

Challenge: can black deal with the weakness (eliminating it or removing the opponent’s ability to take advantage of it)?

The bishop has control of key squares {e5, d4} with a5 maybe is impossible bring the knight to c6. The other possibility "doble rook in c file" blacks I think they can exchange the rooks 

the only way is that when the horse arrives at d4 sacrificing the powerful bishop of the fiancheto bishop by d4

I'd play e6 if I were black, thus forcing White to either relieve pressure on c6 or trade rooks. Either way the pressure will be relieved.

You really dont want to give up the bishop, and playing e6 could run into white playing Nc6 anyway, which seems to be extremely good for white. 

Instead id try to play Qa7, locking down the d5 square and if white plays Rfd1 to reinforce id trade rooks on c1 and after Rd1 id play my rook to c8, If he instead trades on c8 and plays Rfd1, you get the same position without loosing a tempo so seems better. However in that position white would be in trouble after Rc4 with the threath of taking on e4 or doubling with the queen and playing Rd2. 
Basically forcing white to abandon any atempt to put the knight on c6. 

Yes, I would  trade rooks.