Final answer:
When the assistance level is less than 25% for tub/shower transfers, a rolling shower chair that the helper pushes is the best option.
Step-by-step explanation:
When the assistance level is less than 25% for tub/shower transfers, the best option would be a rolling shower chair that the helper pushes. This type of chair allows the student to safely transfer from the tub to the shower with minimal assistance. It provides mobility and stability, making it a suitable choice when the assistance level is low.
Using a mechanical lift or having two helpers may not be necessary in this scenario, as they would provide more assistance than required. These options are typically used when the assistance level is higher, such as when the student is unable to bear weight or has limited mobility.
In summary, when the assistance level is less than 25% for tub/shower transfers, the rolling shower chair that the helper pushes is the best option.