Which of the following were ways that the Second Industrial Revolution alleviated problems created by the First Industrial Revolution? (Select all that apply).
a. Improved transportation allowed people to live further from the factories where they worked.
b. New inventions and improvements in medical care helped people live longer, healthier lives.
c. Higher standards of living improved life for most people living in industrialized nations.
d. Building standards in cities improved, leading to healthier, safer environments.
e. Emerging Labor Unions helped to improve wages and working conditions for workers.