The effect is the following

Companies begin to prioritize advertising and the use of professional advertising firms

Pick the following cause

Consumers had more choices for good to buy from more companies than ever before.

The new urban working population had more time and money to spend on shopping.

People became less interested in shopping because they struggled to meet their basic needs.

The population in the East Coast cities were declining as people chose to move out west.

1 answer

The most appropriate cause for the effect described is:

The new urban working population had more time and money to spend on shopping.

This cause aligns with the effect of companies prioritizing advertising and utilizing professional advertising firms, as a larger, more affluent urban workforce would drive competition among companies to attract consumers through advertising.