Option A is wrong, the accounting software interface used by the enterprise should be Chinese and provide Chinese processing support, and it can also provide foreign language or small language interface comparison and processing support; Option b is wrong. The accounting software used by enterprises should provide irreversible bookkeeping function to ensure the continuous numbering of similar bookkeeping vouchers. It is not allowed to delete and insert accounting vouchers, nor to modify the date, amount, account and operator of accounting vouchers.