How should the campaign Business Practitioner build the workflow to begin to use the mobile phone type attribute in a targeting workflow?

A campaign Business Practitioner is provided a text file of mobile phone types and their associated recipient email addresses.

How should the campaign Business Practitioner build the workflow to begin to use the mobile phone type attribute in a targeting workflow?
A . An update data activity to import the txt file into workflow and a query activity to select all mobile phone types
B . A query activity to import the text file and an intersection activity to find matches between recipients and the text file
C . 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
D . A read list activity to import the text file into the workflow and a split activity to segment the mobile phone type

Answer: C