Which of the following are the powers and functions of the Authority as laid down under the PFRDA Act?

Section 14.  Duties, powers and functions of Authority: (2) Without prejudice to the generality of the provisions contained in sub-section (1), the powers and functions of the Authority shall include-- (a) regulating the National Pension System and the pension schemes to which this Act applies; (b) approving the schemes, the terms and conditions thereof and laying down norms for the management of the corpus of the pension funds, including investment guidelines under such schemes; (c) registering and regulating intermediaries; (d) issuing to an intermediary, on application, a certificate of registration and renewing, modifying, withdrawing, suspending or cancelling such registration; (e) protecting the interests of subscribers by-- (i) ensuring safety of the contribution of subscribers to various schemes of pension funds to which this Act applies; (ii) ensuring that the intermediation and other operational costs under the National Pension System are economical and reasonable; (f) establishing mechanism for redressal of grievances of subscribers to be determined by regulations;  (g) promoting professional or organisations connected with the pension system; (h) adjudication of disputes between intermediaries and between intermediaries and subscribers; (i) collecting data and requiring the intermediaries to collect such data and undertaking and commissioning studies, research and projects; (j) undertaking steps for educating subscribers and the general public on issues relating to pension, retirement savings and related issues and training of intermediaries; (k) standardising dissemination of information about performance of pension funds and performance benchmarks; (l) regulating the regulated assets; (m) levying fees or other charges for carrying out the purposes of this Act; (n) specifying by regulations the form and manner in which books of account shall be maintained and statement of accounts shall be rendered by intermediaries; (o) calling for information from, undertaking inspection of, conducting inquiries and investigations including audit of, intermediaries and other entities or organizations connected with pension funds; (p) exercising such other powers and functions as may be prescribed.