Final answer:
The statement that is correct regarding primary and secondary markets is 'None of the above.' Primary markets involve initial securities issuance, while secondary markets handle the trading of existing securities.
Step-by-step explanation:
The correct option regarding the differences between primary and secondary markets is "c. None of the above." Primary markets are platforms where securities are created, which is where initial public offerings (IPOs) occur and investors buy directly from the issuer. Secondary markets, on the other hand, are where existing securities are traded among investors after the original issuance. This is where most of the trading happens and provides liquidity to investors, allowing them to sell their assets to other investors rather than back to the original issuer. It's important to note that the size of an IPO is not what distinguishes a primary from a secondary market, as implied by option b.