Which of the following statement is true about a finite geometric sequence?            
    
A. It is possible to find the sum of all finite geometric sequence.                
B. It is possible to find the sum of finite geometric sequence only if 1< r < -1, where r ≠ 0.                
C. It is possible to find the sum of finite geometric sequence only if r > 1 or r < -1.
D. It is impossible to find the sum of finite geometric sequence. ​