What is the optimal segmentation process that NTO should use to ensure only Platinum members receive the journey emails?

Northern trail Outfitters (NTO) is designing a journey for its platinum loyalty members. There are more than 2 million NTO loyalty but 100,000 of them qualify as Platinum. NTO stores all loyalty member information in a single data extension.

What is the optimal segmentation process that NTO should use to ensure only Platinum members receive the journey emails?
A . Use Filter Contacts criteria in the journey entry source.
B . Use a Decision Split activity on the journey canvas.
C . Use Automation Studio to query a population into a data extension.

Answer: C