Can someone me? and explain be100% sure .

a truck’s fuel tank holds 45 gallon of fuel. the fuel gauge below shows the tank’s current fuel level. the tick mark closest to the “f” represents a full tank, and the tick mark closest to the “e” represents an empty tank.

if each tick mark on the gauge represents one quarter of the tank, which is the best estimate of the number of gallons of fuel remaining in the tank?
a. 15
b. 20
c. 25
d. 30