What Are Environmental Demands,as Defined by Lawton and Nahemow (1973)

What are environmental demands,as defined by Lawton and Nahemow (1973) ?

A) the demands that a particular situation makes on a person's physical health, psychological adjustment, and intelligence
B) the interaction between a person's abilities and a person's needs
C) environmental forces, combined with a person's need, that leads a person to make a response
D) environmental forces that cannot be adequately dealt with by an individual's capabilities