Walt Whitman put forward his own set of（ ） principles. Leaves of

Walt Whitman put forward his own set of（ ） principles. Leaves of Grass was just the expression of these principles.
A、psychological
B、religious
C、philosophical
D、aesthetic
【正确答案】：D
【题目解析】：沃尔特·惠特曼提出了自己的一套美学原则。《草叶集》正是这些原则的体现。psychological——心理上的；religious——宗教的；philosophical——哲学的；aesthetic——艺术的，审美的。故选D。