Final answer:
The area of triangle MNO cannot be determined without additional information.
Step-by-step explanation:
To find the area of a triangle, we can use the formula: Area = 1/2 * base * height.
In this case, the base of triangle MNO is not given, so we cannot determine the area without additional information.
Therefore, none of the given options (a, b, c, d) can be the correct answer since we do not have enough information to calculate the area of triangle MNO.