When Comparing the Older American's Resources and Services (OARS)with the Katz

When comparing the Older American's Resources and Services (OARS) with the Katz index of ADLs,what is true?

A) The Katz index and the OARS both measure only ADL performance.
B) The OARS is a comprehensive assessment tool that measures ability in five areas; the Katz index measures only ADL performance.
C) The OARS is used only for older adults in the long-term care setting; the Katz index is used in all settings.
D) The OARS is not valid for use in older adults who are cognitively impaired,whereas the Katz index is.