Effect: Companies began to prioritize advertising and use the services of professional advertising firms

Cause:__________
consumers had more choices for goods 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 was declining as people chose to move out west

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

Cause: Consumers had more choices for goods to buy from more companies than ever before

Explanation:
The cause for companies prioritizing advertising and using professional advertising firms is that consumers had more choices for goods to buy from more companies than ever before. This means that with an increasing number of companies and options available, businesses needed to find a way to stand out and attract customers to their products or services. As a result, they began to prioritize advertising and sought the help of professional advertising firms to create effective marketing campaigns that would reach the target audience and increase sales.