（）是一种适应不良的经济行为，具体表现为在某方面一旦投入金钱、努力或时间之后就表现出继续投入的巨大倾向。

A、羊群行为

B、从众心理

C、沉没成本效应

D、心理账户

• (A) 条件(1)充分，但条件(2)不充分．
• (B) 条件(2)充分，但条件(1)不充分．
• (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
• (D) 条件(1)充分，条件(2)也充分．
• (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

A piece of paper in the shape of an isosceles right triangle is cut along a line parallel to the hypotenuse of the triangle, leaving a smaller triangular piece. If the area of the triangle was 25 square inches before the cut, what is the new area of the triangle
(1) The cut is made 2 inches from the hypotenuse.
(2) There was a 40 percent decrease in the length of the hypotenuse of the triangle.