Q: In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Problem: the area of a rectangle is 63 sq m . the width is two meters shorter than the length . what is the width ? 
Options: ['a ) 9', 'b ) 7', 'c ) - 9', 'd ) 11', 'e ) 6']
A:
b