Which of the following statements is correct about the acceptance criteria of the data center...

Acceptance criteria can be used to verify whether data migration is completed as planned but not to verify services.

If acceptance criteria, scope, process, or relevant documents need to be changed after the contract is signed, both parties must synchronize the changes on their contracts. All changes shall be approved by both parties.

If the migration project is delayed for the non-supplier's reason, the purchaser can be exempted from obligation to the supplier based on actual situations.

If some failed check items do not affect system performance and the faults are recorded and resolved by the supplier, the purchaser shall issue the acceptance certificate.