I find this unconvincing on several ______.

The English writing of college students in China is generally redundant for lack of specific words． A: ambiguous B: wordy C: unconvincing D: stereotyped

In his two-hour-long lecture he made an exhaustive analysis of the issue. A: extremely thorough B: long and baring C: superficial D: unconvincing

In his two-hour-long lecture he made an exhaustive analysis of the issue(). A: extremely thorough B: long and boring C: superficial D: unconvincing

In his two-hour-long lecture he made an exhaustive analysis of the issue. A: extremely thorough B long and boring B: superficial C: D. unconvincing

In his two-hour-long lecture he made an exhaustive analysis of the issue. A: extremely thorough B: B. long and boring C: superficial D: unconvincing

Mr Phillips' thought is made unconvincing by A: the suggestion mentioned in paragraph Ⅱ. B: the statistics revealed in paragraph Ⅴ. C: the conclusion made in the last paragraph. D: the figures betrayed in paragraph Ⅱ.