Instructions: In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Input: Problem: a triangle and a parallelogram are constructed on the same base such that their areas are equal . if the altitude of the parallelogram is 100 m , then the altitude of the triangle is .
Options: ['a ) 10 2 m', 'b ) 100 m', 'c ) 100 2 m', 'd ) 200 m', 'e ) none']
Output:
d