Concept:A payment voucher is the official document used to authorise and record any payment from government funds.Explanation:Government payments are not made directly on an invoice, receipt, or bill.The responsible officer first prepares a payment voucher.This voucher authorises the cashier to disburse the fund.It also serves as evidence that the payment was approved and made.Therefore, the document prepared for the disbursement of government fund is the payment voucher.Answer:C. a payment voucher