From 1935 to 2017, the yield per acre for wheat has ________ in the United States.
A. roughly doubled
B. slightly declined
C. more than tripled
D. increased more than 6-fold
Answer: C
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Marginal utility theory implies that, starting from consumer equilibrium, a rise in income will __________.
Use the figure below to answer the following question. 
A movement along the supply schedule from point y to point x is associated with
A. diminishing marginal utility. B. diminishing marginal product. C. increasing marginal product. D. increasing marginal utility.
If a good is not produced, then there is no demand for it
Indicate whether the statement is true or false
A system financed primarily through retrospective fee-for-service insurance reimbursement is:
a. A closed system. b. An open-ended system. c. A cost-plus system d. An efficient system. e. Both b and c.