Directions: The question below is followed by six choices numbered 260-265. If a choice is correct, mark A in the space provided. If a choice is not correct, mark B. Blacken one circle on your answer sheet for each number.
The nurse is teaching an adolescent with inflammatory bowel disease about treatment with corticosteroids. Which adverse effects are concerns for this client

Acne.

下列现象不属于相关关系的是（）。

A．家庭收入越多，消费支出越多

B．广告支出增加，商品销售额增加

C．圆的半径越大，圆的面积越大

D．商品价格越低，销售量越大