The correct option is C.
There are two basic ways of buying stocks; one can buy stocks either through online brokerages or through the traditional full service brokers. These days, most people buy their stocks through online brokerages. The online brokerage is relatively easier to use, all that one has to do is open an account with an online brokerage company and then fund the account with money. One can then determine the type of stock to buy and place an order for it. A good example of an online brokerage company is TD Ameritrade.