My sister was against my suggestion while my brother was ______ it. [ ]

A. in honor of

B. in memory of

C. in search of

D. in favor of

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．

可以确定p³+p²+p=1。
(1)a+2b+3c=6，且a²+b²+c²=ab+bc+ca，p=a+b²+c³;
(2)

．