William, an employee of Monica Company, was sent to an out$-$of$-$state conference to learn about the latest innovations in computer security. While he was at the seminar, his meals were picked up by a vendor hoping to get business from Monica Company. William also turned in receipts and requested reimbursement from his company for the same meals that the vendor paid for. What type of expense reimbursement fraud is this?

Mischaracterized expense

Overstated expense

Fictitious expense

None of the above