A customer wants to upgrade an existing pSeries system. In addition to retrieving the IBM configuration records， what else should be done to ensure an accurate upgrade quote is provided？（）
- ARequest that the pSeries technical specialist provide the discount percentage to the customer.
- BRun both eConfig and PCRS6000 to ensure that both configurators provide the same upgrade quote.
- CConfirm with the customer that the installed inventory accurately reflects what is actually installed.
- DProvide options to the customer so they can choose the most appropriate upgrade for their environment.