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Consider the following pairs of items:
a. shampoo and conditioner
b. iPhones and earbuds
c. a laptop computer and a desktop computer
d. beef and pork
e. air-travel and weed killer
Which of the pairs listed will have a positive cross-price elasticity?
Platysma
A superficial muscle in the neck that plays a role in facial expression.
Risorius
A muscle of facial expression, drawing the corner of the mouth laterally, thus creating expressions like grinning.
Lateral Pterygoid
A muscle of the jaw involved in opening the mouth and moving the jaw from side to side.
Mandible
The lower jawbone, which is the largest and strongest bone in the human face.
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