Question $20(2$ points$)$

Describe a key reason why so many department stores closed their doors in the $\text{'}60$s and $\text{'}70\text{'}$s$.$

a$)$ Discount department stores were new competition.

b$)$ Populations were decreasing in metropolitan areas.

c$)$ Regional distribution centers were growing quickly.

d$)$ Direct sales retailing increased competition.