The european system of manorialism is most

closely associated with

(1) promoting social mobility

(2) reviving and preserving learning

(3) serving the spiritual needs of society

(4) maintaining economic self-sufficiency

the american rail road was the most influential and useful transportation system developed in the 1800's with steam locomotives and in the very late 1800's and early 1900's diesel electric locomotives being used to transport goods and people around the newly expanded united states!

porter is writing economic history because he is focusing on the cost of developing vaccines.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

dont kniw hope this hepl you