Final answer:
A Hoyer lift should be used to transfer the client when using the Mobility Assessment Tool (MAT).
Step-by-step explanation:
When using the Mobility Assessment Tool (MAT) to transfer a client who requires total assistance with mobility, the nurse should use a Hoyer lift.
A Hoyer lift is a mechanical device that is used to transfer patients from one surface to another, such as from a bed to a wheelchair.
It provides support and stability for the patient during the transfer process, ensuring their safety and preventing injuries.