The principle of tax neutrality means that state taxation should minimize tax interference or distort market mechanisms, and should not go beyond the market and become a force that affects resource allocation and economic strategies. Based on the above definition, which of the following is options applied to the principle of tax neutrality? ['the introduction of policies requires companies to pay more taxes.', 'Reduction and exemption of foreign corporate income tax.', 'tax rates are not linked to income levels.', 'Raising the threshold for business tax.']