How would secondary socialization impact a grocery shopping trip?
a. shoppers use math and budget their money.
b. shoppers can read the labels on the items to make decisions.
c. shoppers create lists they can use to pick up what they need.
d. shoppers know to wait in line to check out.

D. Shoppers know to wait in line to check out.

Explanation:

Secondary socialization refers to the learning process that a group of people have to go through in order to understand the 'proper behavior' that being carried out when they are interacting with other group of people in order to avoid conflict.

In this context, the one that has to learn the proper behavior are the grocery  shoppers and they had to learn it from the shop workers.

When the new shoppers want to interract with the workers, they will see that other experienced shoppers wait in-line before paying the products (or they could see the sign that provided by the workers) . Just by seeing this, they learn the 'proper' behavior to purchase the product and follow it to avoid disorder.