Compare retail investors to institutional investors.

A$.$ Retail investors trade securities for other investors while institutional investors trade for their own personal accounts.

B$.$ Retail investors trade securities for their own personal account while institutional investors trade for other investors.

C$.$ Retail investors trade a large volume of securities while institutional investors trade a small volume of securities$.$

D$.$ Retail investors trade in exempted securities while institutional investors trade in non$-$exempted securities$.$