Unlike Day Orders,a Good-Till-Cancelled (GTC)order Is an Order to Buy

Unlike day orders,a good-till-cancelled (GTC) order is an order to buy or sell a security at a specific or limit price that lasts until the order is completed or cancelled.Which of the following is true?

A) A GTC order will not be executed until the limit price has been reached,regardless of how many days or weeks it might take.
B) Investors often use GTC orders to set a limit price that is far away from the current market price.
C) Some brokerage firms may limit the time a GTC order can remain in effect and may charge more for executing this type of order.
D) all of the options