Task: Question Answering
Input (English): Problem: abcd is a parallelogram . bd = 2 . the angles of triangle bcd are all equal . what is the perimeter of the parallelogram ? 
Options: ['a ) 12', 'b ) 9 √ 3', 'c ) 9', 'd ) 8', 'e ) 3 √ 3']
Output (English): d