Which of the following sentences uses positive language for the entire sentence?
1) Because you neglected to use a cash register receipt, we can't process your rebate.
2) We cannot process your rebate until we receive your cash register receipt.
3) When a copy of the receipt failed to be provided, the decision was made not to process the rebate.
4) We look forward to processing your rebate as soon as we receive a copy of your cash register receipt.