The difference between adls and iadls is that:
a. adls are simple enough that even the frail elderly can do them independently.
b. iadls are the same across cultures.
c. adls require professional training.
d. iadls require some intellectual competence.

The answer is D: IADLs require some intellectual competence.

Explanation:

The difference between ADL and IADL is that IADL requires some intellectual competence, while ADL, also known as "Activities of daily living" requires no intellectual competence. ADLs include activities like dressing, eating, using the toilet, bathing, getting out of a chair or bed etc. These are basic things that requires minimal support or competence.

On the other hand IADL is known as "Instrumental activities of daily living". Some activities in this category are preparing meals, using a telephone, shopping etc. These activities need some level of competence to accomplish them accurately.

steady state because it the only on that maes sense