The sustained productivity growth of railroads occurred primarily ...

[jazziefee]

The sustained productivity growth of railroads occurred primarily because of:
 a. increased economies of scale.
  b. more powerful locomotives and more efficient freight cars.
  c. stronger steel rails.
  d. the advent of refrigerator cars.

Question 2

Railroad construction in the late 19th century:
 a. added little to economic fluctuations.
  b. strongly influenced capital formation.
  c. caused the three major financial crisis of that era.
  d. All of the above are correct.
  e. Only b and c are correct.

[bigsis44]

Answer to Question 1

a. increased economies of scale.

Answer to Question 2

b. strongly influenced capital formation.