In Deciding What the Optimal Housing Arrangement Might Be for an Older

In deciding what the optimal housing arrangement might be for an older person (at home, in cluster housing, in assisted living, etc.) , one particularly critical component in making this decision is

A) the physician's assessment of what is best.
B) the cost of the various options.
C) the involvement of the person in question, to the extent possible.
D) the range of services provided at each facility.