Which steps should be used to accomplish this in Journey Builder?

A customer wants to automate the process of sending a series of welcome emails based on the Subscriber’s data. Emails should be sent weekly for up to five weeks. If a subscriber makes a purchase, they should stop receiving welcome emails. A Boolean flag should be set in the data extension if the subscriber makes it through the welcome series.

Which steps should be used to accomplish this in Journey Builder?
A . Define Goal, Send Email, Wait, Decision Split
B . Random Split, Send Email, Wait, Define Goal
C . Define Goal, Update Contact Data, Send Email, Wait
D . Update Contact Data, Wait, Send Email, Join

Answer: C