What is the authors' purpose in this passage?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.

Which economic sector employs the least number of people in mexico, barbados, and venezuela? a. agriculture b. services c. industry

Which aspect of the postwar era did jazz’s liveliness, looseness, and improvisation most reflect?