Identify the sequence as arithmetic, geometric, or neither: 7, 21, 35, .. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The sequence is geometric because each term is found by adding to the previous term. B. The sequence is arithmetic because each term is found by multiplying the previous term by C. The sequence is geometric because each term is found by multiplying the previous term by O D. The sequence is arithmetic because each term is found by adding to the previous term. O E. The sequence is neither arithmetic nor geometric