Italian nationalism was inspired in the 1830s and 1840s by the writings of

i'm not sure i understand what you are trying to ask, if you give more information, that would be most .

d. it adversely affected american productivity

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.

i would say b. or c.