单项选择题
A.短信催收;上门催收;委外催收 B.信函催收;电话催收;上门催收 C.信函催收;上门催收;委外催收 D.电话催收;上门催收;委外催收
A.短信催收;上门催收;委外催收 B.信函催收;电话催收;上门催收 C.信函催收;上门催收;委外催收 D.电话催收;信函催收;委外催收