题目

While assisted living centers have been available in the United States for many years, the growth and availability of assisted living has had a dramatic increase since the early 1990s. An assisted living center is a residential alternative that promotes maximum independence for each resident through a combination of supportive services and assistance. The definition of assisted living from one state to another may vary and so will the cost and types of services. Assisted living centers vary in size, style and the optional services they may offer. Small family style living or the larger complex 已知函数，则f[f(－2)]＝ [　　] A．16 B．－8 C．8 D．8或－8