What is the difference between direct financial intermediation and indirect financial intermediation?

I - Direct financial intermediation is one in which there is direct contact between surplus agents and deficit agents, while indirect financial intermediation is one in which the surplus agent cannot identify the deficit agent.
II - In direct financial intermediation, the intermediary is the Stock Exchange, while in indirect financial intermediation, the intermediaries are banks and non-bank financial institutions.
III - Direct financial intermediation is regulated and supervised by the Superintendence of the Stock Market, while indirect financial intermediation is regulated and supervised by the Superintendence of Banking and Insurance.
IV - In direct financial intermediation, the instruments used are financial documents such as bills of exchange and promissory notes, while in indirect financial intermediation, the instruments used are bank deposits and loans.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only III and IV are correct.
d) All statements are correct.