Please identify to which categories the underlined part is in the following definition.Accessibility refers to the design of products and environments for people with disabilities（）
A term to be defined
B. The general class that the target term belongs to
C. Differentiating features of the target term
D. /
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Suppose a retail store was offering 10% off list prices on all goods. The benefit of the 10% savings is（）
A. negatively related to the list price of the good
B. zero since costs and benefits shouldn’t be measured proportionally
C. unrelated to the list price of the good
D. positively related to the list price of the good
Alex received a four-year scholarship to State U. that covered tuition and fees, room and board, and books and supplies. If Alex becomes a full-time student, then（）
A. the opportunity cost of attending State U. includes the sum of the benefits Alex would had from attending each of the other schools to which he was admitted
B. the opportunity cost of attending State U. includes the money Alex could have earned working for four years
C. attending State U. for four years is costless for Alex
D. Alex has no incentive to study hard while at State U
Ginger bought a phone that came with a $10 rebate. Ginger should fill out and mail in the rebate form if（）
A. the opportunity cost of the time and trouble of sending in the rebate form is less than $10
B. the opportunity cost of the time and trouble of sending in the rebate form is more than $10
C. Ginger’s surplus from purchasing the phone was less than $10
D. she would have bought the phone without the rebate, and so sending in the rebate form involves no opportunity cost
Choosing to study for an exam until the extra benefit （e.g., improved score） equals the extra cost （e.g., the value of foregone activities） is（）
A. not rational because it ignores the importance of total benefits and total costs
B. an application of the Cost-Benefit Principle
C. not an economic choice
D. an application of the Scarcity Principle
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