What manufacturers keep up with consumers in the 1920s?
fewer regulations and lower taxes
more regulations and lower taxes
changing demands of buyers
aggressive advertising campaigns

The answer to the question stated above is the first option, fewer regulations and lower taxes
Fewer regulations and lower taxes helped manufacturers keep up with consumers in the 1920s.

The government helped in this by keeping taxes as low as possible. They also followed the policy of laissez faire, whereby  the government interfered as little as possible in the running of the economy.

1.a)britain

2.b)spain

3.c)french

4.d)portugal

explanation:

ching cong bing bong