The correct answer is: B. liquidity.
Liquidity is the ability to buy or sell an asset quickly and easily at a fair price. A liquid market has a high level of buyers and sellers, which means that assets can be bought and sold quickly without affecting the price.
Original trading is the first trade of an asset. This can be done through an initial public offering (IPO) or through a secondary market.
Offline trading is the process of buying and selling assets outside of a formal market. This can be done through private transactions or through over-the-counter (OTC) markets.
Fixed price trading is the process of buying and selling assets at a predetermined price. This is often done in commodities markets.
In conclusion, the ability to trade at net price very quickly is classified as liquidity. This is because liquidity refers to the ability to buy or sell an asset quickly and easily at a fair price. A liquid market has a high level of buyers and sellers, which means that assets can be bought and sold quickly without affecting the price.