In which two scenarios should an Administrator use member engagement attributes?

In which two scenarios should an Administrator use member engagement attributes?
A . Member is eligible for ‘Bonus days” if the member constantly speeds more than $500 each month for a year.
B . Member attends three trainings between March 1st and April 30th to get 200 bonus points.
C . Member buys apparel online and gets 400 bonus points if the member belongs to Gold Tier only.
D . Member enrolls in “welcome aboard” promotion for free surprise gift every quarter.

Answer: A, B