Advertising in the united states was a small business until the mid-1800s, when industrialization and combined to alter the social and cultural landscape, bringing about advertising's expansion.
a) the spanish-american war
b) the introduction of radio
c) the civil war

c) the Civil War

Explanation:

Rapid industrialization in the mid-nineteenth century boosted the American market and there was enough scope for the advertisement companies to announce the availability of the products and unnecessary attempts to convince consumers were avoided. During the Civil War, the advertisement industry was benefited by the war bond advertisement and there was a rapid rise following the civil war because of the improvement in communication and industrialization. Almost every sector included display advertisement after the Civil War.

the civil war was a fulfillment and completion of the constitution, not a revolution against it. changes in culture and society surely affected political life. lincoln hoped to bring the north and south together after the war by healing the nationand making people lose their resentment.

hope this you out just took thus test a min go and mad a 100

i think the answer is a and i hope this ; ))