As it is given that Bulk modulus and density related to velocity of sound

by rearranging the equation we can say

now we need to find the SI unit of Bulk modulus here
we can find it by plug in the units of density and speed here

so SI unit will be

SO above is the SI unit of bulk Modulus
It will be 25 if the car moves at that speed for 15 minutes
Convection is the answer i
think
Answer:
C.
Measure the wear on his treads before and after riding a certain number of laps.