Look at this series: 70, 71, 76, ____, 81, 86, 70, 91
What number should fill the blank?
I. 70
II. 71
III. 80
IV. 96
Question: 以下哪项是正确的？
Options:
A. 仅 III, B. 非 II, C. II 或 III, D. 以上各项均不成立, E. I 或 II
Answer: B, E