【单选题】应用程序调用一个XML Web service运行。XML Webservice将返回一个ADO.NET DataSet 对象,
A、customerProspects.Merge (wideWorld, true, MissingSchemaAction.Ignore)
B、customerProspects.Merge (wideWorld, true, MissingSchemaAction.AddWithKey)
C、wideWorld.Merge (customerProspects, true, MissingSchemaAction.Ignore)
D、wideWorld.Merge (customerProspects, true, MissingSchemaAction.Add)