A. A data loading activity to import the text file into the workflows and enrichment activity to link recipient email address to email address in the text file

B. A read list activity to import the text file into the workflow and a split activity to segment the mobile phone type

C. An update data activity to import the txt file into workflow and a query activity to select all mobile phone types

D. A query activity to import the text file and an intersection activity to find matches between recipients and the text file