How would you design this Multiple select?

send multiple emails over a period of 3 months with link to download mobile app. If link clicked then send app feature emails else same mails to download mobile app after every 3 days.

How would you design this Multiple select?
A . use journey with email activities and enagagement split activity
B. use query activity to query _ click and use contact data in journey.
C. use contact designer
D. use Journey data and not contact data

Answer: A,D