Securities investment funds implement the principle of * * * sharing benefits and * * * taking risks. Fund investors are the owners of funds. All the surplus of fund investment income after deducting the expenses borne by the fund belongs to fund investors, who will generally distribute it according to the proportion of fund shares held. Fund custodians and fund managers who provide services for the fund generally collect a certain proportion of custody fees and management fees from the fund assets according to the provisions of the fund contract, and do not participate in the distribution of fund income. Option b is wrong, in line with the meaning of the question.