Your reasoning is spot on! The question asks which activity your *least* likely to recommend. Any of the options are better than walking outdoors at noon. Given that body temperature and fatigue are lowest in the morning, the sunrise bike ride may be the best option for this patient. Regarding exercise vs. ADLs – I always prioritize function, so timing will vary from patient to patient. I never want someone to exercise so much that they are unable to complete their life roles.
Hope this helps!