hello!

Please help me pick the right answer for questions A to E, only one answer on each is correct.

also, motivate your answer in short.

thanks.

a) Which of the following statements is an appropriate description of a blockchain? i. A cryptocurrency ii. A decentralized database iii. An institutional order iv. None of the above b) Which of the following statements about MiFID 2 are false? i. Capping dark pool volumes for each stock at 12% (excluding 'large-in-scale' orders) ii. Extending current rules to non-equity markets iii. Increasing regulation of high-frequency trading firms iv. Unbundling of payments for research and execution services c) A systematic internaliser is... i. ... dealer market ii. ...an auction market iii. ...a dark pool iv. ...a hybrid market d) Which of the following features are consistent with the efficient market hypothesis? i. 1-minute returns have a significantly negative serial correlation ii. 1-minute returns have a significantly positive serial correlation iii. Prices change gradually in response to news iv. None of the above e) Which of the following components are accounted for by the Glosten-Harris model? i. Order processing costs ii. Inventory costs iii. Adverse selection costs iv. None of the above