Question

the headline on a personal technology column in the wall street journal in late 2022 was these next generation headphones dont even go in your ears. according to the column, unlike the earbuds that many people use with their smartphones, bone - conduction headphones are built differently.... they rest above your ears, leaving your ear canal unencumbered, and vibrate against the part of your skull adjacent to your inner ear. source: daniel modlin, these next generation headphones dont even go in your ears, wall street journal, november 9, 2022. a. are bone - conduction headphones substitutes for or complements to smartphones? a. bone - conduction headphones and smartphones are substitutes because when the price of one falls, the demand for the other rises. b. bone - conduction headphones and smartphones are complements because people who buy a smartphone may also buy bone - conduction headphones to listen to music or videos on their smartphone. c. bone - conduction headphones and smartphones are substitutes because people who buy a smartphone may also buy bone - conduction headphones to listen to music or videos on their smartphone.

Explanation:

Complements are goods that are used together. People use bone - conduction headphones with smartphones to listen to music or videos, so they are used in conjunction. When the price of one good affects the demand for another in a complementary way (a fall in the price of one leads to an increase in the demand for the other), they are complements.

Answer:

B. Bone - conduction headphones and smartphones are complements because people who buy a smartphone may also buy bone - conduction headphones to listen to music or videos on their smartphone.