What end-to-end process should deliver this efficiently?

Every day at 3 a.m., Northern Trail Outfitter’ (NTO) data lake instance starts generating a file that contains all records that should be sent one email or another for the next day’s marketing campaigns. The size of the file varies depending on the previous day’s tracking activity. As soon as the file is generated, NTO wants to import the data, segment the data, and then execute the daily sends.

What end-to-end process should deliver this efficiently?
A . Scheduled Automation > File Transfer > Import > Series of Query Activities
B. Triggered Automation > Import Activity > Series of Query Activities > Series of Sends
C. Scheduled Automation > Import Activity > Series of Query Activities > Series of Sends
D. Triggered Automation> Import > Data Extension Extract > Marketing Journey

Answer: C

Explanation:

This end-to-end process will efficiently deliver the desired result of importing the data from the data lake instance, segmenting it, and then executing the daily sends. The scheduling of the Automation will allow the process to run each day at 3 a.m., and the Import Activity will import the generated file. The data can then be segmented using a series of Query Activities and the emails can be sent using a series of Sends.

Reference: https://help.salesforce.com/articleView?id=mc_es_automation_studio_overview .htm&type=5