To demonstrate success by focusing on the learner’s desired outcome, a…

In instructional design, objectives are written at different levels of specificity. A "mastery" (specific/behavioural) objective states one precise, minimum-acceptable performance criterion for a single behaviour. A "general" objective is a broader statement that can encompass a range of related outcomes at once, which keeps the overall set of objectives reasonable in number even though the content being taught is wide-ranging.

The sentence asks for "a reasonable list" of objectives that still lets the learner demonstrate success by focusing on the desired outcome -- that is, broad coverage kept within a workable, manageable number of statements. A smaller set of broader statements can span many desired outcomes at once, so the list stays reasonable in size. That breadth-with-manageability requirement is what the word in the blank must describe.

• Informational -- names only the content or topic to be communicated to the learner; it does not describe a performance the learner demonstrates, so it does not match the sentence's focus on the learner's desired outcome.

• Mastery -- names one exact, minimum-acceptable performance criterion for a single behaviour; writing one such precise statement per outcome multiplies the list rather than keeping it reasonable in number.

• Challenging -- describes how difficult a task or performance is meant to be, not how many objectives are needed to cover a range of desired outcomes.

• General -- fits: a workable number of broader statements can still span the full range of desired outcomes, which is exactly the "reasonable list" the sentence describes.