For which of the following goods is the income elasticity of demand likely highest?
a. doctor’s visits
b. natural gas
c. boats
d. hamburgers

c. boats 

Explanation:

Income elasticity of demand measures how quantity demanded responds to changes in price.

Goods that are considered necessities usually have the lowest income elasticity of demand. Therefore, the income elasticity of demand for doctors visits and natural gas would be relatively low.

The income elasticity of demand for luxury goods are usually high. Therefore, the income elasticity for boats would be high.

Goods whose price is small compared to income would have a low income elascitiy. Therefore, the income elasticity for hamburgers would be low.

I hope my answer helps you.

i mean, there is a lot of homeless people. but it is a very busy place and always in need for people who can be busy so it's not impossible to find one.

a is the correct answer, tell me if im right