Xiao Zhou announced he was switching careers to data analysis. Within six months, he bought five online courses and posted daily on social media: "Learned another three hours today." When friends asked him: What counts as a successful transition? What visible changes in ability should be seen after six months? How often does he plan to review progress? He couldn't answer any of these, only saying "I've been working hard." According to the seven-step checklist, which steps are at least missing from this plan?

Answer: AB

• AMissing the goal step: "Career switch" is just a wish, not written as an observable outcome, and it's unclear what counts as success.✓ Correct. The stem states he cannot answer what counts as success, so the goal remains a slogan, violating the first step of "write a concrete goal, not a slogan."
• BMissing the feedback cycle: There is no agreement on what signals to use, how often to check whether the method is effective, and adjust accordingly.✓ Correct. He cannot answer how often to review, indicating the absence of the feedback cycle required by the seventh step, making it impossible to assess the method's effectiveness in the long run.
• CThe causal check is complete: He is executing learning actions every day, and the mere execution of actions proves the cause-and-effect between the means and the goal.✗ Incorrect. The misconception here is treating "the means being executed" as "the causal relationship has been tested." The third step requires explaining how this means promotes the goal; daily check-ins do not constitute such a test.
• DMissing the list of means: He only bought courses and made no study plan; he should first add a detailed weekly action list.✗ Incorrect. Buying five courses and checking in for three hours daily is already an explicit action list; the misconception is confusing "the means may not be good" with "no current means are listed."