What automation sequence (excluding waits) should cover these requirements?

A company collects subscriptions on its websites. It does the following:

• Compiles that subscription list in a database in the website content Management System (CMS).

• Posts this encrypted list to Marketing Cloud nightly at 11 p.m.

• Uses Marketing Cloud as the database of record.

• Sends up to five emails a week based on subscriber engagement with prior sends.

What automation sequence (excluding waits) should cover these requirements?
A . File Transfer > Import File > Measures > Send Email
B . File Transfer > Import File > SQL Query > Send Email
C . File Transfer > SQL Query > Measures > Send Email
D . File Transfer > Data Extract > Filters > Send Email