Subject: mathqa
Question: the area of a parallelogram is 72 cm ^ 2 and its altitude is twice the corresponding base . what is the length of the base ?
Option: 
A: 1 cm', 'b ) 3 cm', 'c ) 6 cm', 'd ) 4 cm', 'e ) 2 cm']
B: 3 cm', 'c ) 6 cm', 'd ) 4 cm', 'e ) 2 cm']
C: 4 cm', 'e ) 2 cm']
D: 6 cm', 'd ) 4 cm', 'e ) 2 cm']
Answer: D