Much speculation has surrounded the position of paceman Steven Finn in the team following his poor showing against the Aussies in the first Test, with Graham Onions and Tim Bresnan touted as his possible replacements.
However, Cook, whose side lead the series 1-0, says that he is prepared to do whatever it takes for the good of the team.
"You pick a side you think can win and you have to make tough decisions," Cook told BBC Sport.
"Your record at a certain place can play a part.
"You always try to find the balance of the attack for the conditions you find; past form and past bowling [at a venue] is very important."
The second Test gets underway at Lord's today at 11am.