The answers is 2. Acetylcholine
The 1920s was a decade of hope for the Americans. During this period, the standard of living
improved as automobiles, trains and other new modes of affordable
transportation gave rise to the suburbs.
People were more relaxed and wanted to enjoy life as the economy was
doing well during the early years of this decade. In the 1930s, people were still reeling from
the effects of the Great Depression as many were unemployed due to the closure
of businesses and factories. As a result
government expanded its programs and policies to resolve the situation by
establishing various programs to reform the economy.
