Answer:
The Eiffel Tower was built by Gustave Eiffel for the 1889 Exposition Universelle
Answer to the first question: C
Answer to the second question: Pennsylvania
The lost income from not taking a shift at work is an oppotunity cost of studying for a test: FALSE
I believe the answer would be the last option. A resource has value, and people are willing to pay for it most likely because the resource is scarce. When a resource is not enough or the supply is low as compared to its demand, then most likely that price or value of it would increase.