ollecting first$-$party online user data can be challenging. Which of the following effectively balances consumer privacy compliance and increased demands for personalized user experiences?

a$.$

Collect as much data as possible at one or two touchpoints.

b$.$

Collect smaller pieces of information at different touchpoints.

c$.$

Delete any collected user data that is not associated with purchases.

d$.$

Delete any collected user data for visitors who do not convert within $90$ days.