In rolling one die, there are 6 possible outcomes because each die has 4 faces. The number of outcomes when rolling n dice is equal to 6^n. By this, the number of outcomes when 2 dice are rolled is 36, 216 for 3 dice, and so on.
D and E —> substitute the x or y of the point given into the functions to test if it is correct
Your answer should be C! Hope that helps