导致西亚地区不安定的因素很多，下列不是主要因素的是[ ]

A．争夺石油和水资源

B．存在文化差异

C．重要的地理位置

D．以畜牧业为主的农业

The schools themselves admit that not all children will be successful in the jobs ______ they are being trained.

A．in that

B．for that

C．in which

D．for which