The series follows an alternating pattern: subtract 8, add 15, subtract 15, add 15, subtract 15, add 15. Checking: 120 - 8 = 112, but the second term is 128. So 128 breaks the pattern. If the pattern were -8, +15 starting with 120, we'd get: 120, 112, 127, 119, 134... This doesn't match. Actually, the pattern is: -8, +3 repeated but 128 should be 112 to maintain consistency. The claimed answer (A: 128) is correct - 128 is the wrong term.