Concept:The imprest system is a petty cash control method using a fixed float that is restored after each period.Explanation:Statement i is false because the imprest amount is fixed by each organization, so it differs from one organization to another.Statement ii is false because at the end of the period, the petty cashier is not given a fixed sum; they are refunded only the amount spent.Statement iii is true because the petty cashier is reimbursed with the exact expenses incurred during the period.Statement iv is true because the imprest system helps control petty cash expenses.Thus, the correct statements are iii and iv only.Answer:D. iii and iv