Difficulties and hardships have ________ the best character of the young geologist
A.brought in　　B.brought upC.brought outD.brought about在线课程C
bring in:逮捕，搜集；bring up:培养；bring out:产生某种品质；bring about:使……发生。本句意为：困难和困苦已经使那名年轻的地质学家形成了优秀的品格。故选C。