How does the law of supply and demand apply to stocks

Explanation:

The higher the supply the lower the price will be and the higher the demand the higher the price will be. This means that they have an inverse relationship. In short, the more you need something the more you're willing to pay for it, and the less you need it the less you want to pay, and this is basically how the economy works when producing and selling.

the answer is b, encourage free trade

no because it could make the world a terrible place to live in.