Your answer would be B. 247 ft². This is because if you draw the prism out, you can use the dimensions to find the individual surface areas, and then add them together.
So you would do 10 × 6 = 60, and then multiply it by 2 as there are two of each side to get 120 ft². 6 × 4 = 24, and then multiplied by 2 = 48 ft². 10 × 4 = 40, multiplied by 2 = 80 ft².
Then when you add together 120, 80, and 48, you get 248 ft². I hope this helps!
Adding both equations, in this case, gives us the point at which the lines intersect:
Since zero will never equal fourteen, the equation above means that lines BC and AD will never intersect. When two lines have no point in common, they are said to be parallel lines.