Determine whether the sequence is arithmetic, geometric, or neither. If the sequence is arithmetic, give its common difference d. If the sequence is geometric, give its common ratio r. -1, - - 4, - 2 -7,... Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The sequence is arithmetic with a common difference of ary (Type an integer or a fraction.) ns O B. The sequence is geometric with a common ratio of (Type an integer or a fraction.) O C. The sequence is neither geometric nor arithmetic