To find out how much fuel is in Leila's car now, we need to add the amount of fuel she just put in to the amount that was already in the car.
Leila put 14.11 gallons of fuel in the car and there were 1.9 gallons in the car to begin with.
So, 14.11 gallons + 1.9 gallons = 16.01 gallons
This is the correct answer because 14.11 gallons is the fuel Leila put into her car and 1.9 gallons is the fuel that was already in the car. Adding these two values together gives the total amount of fuel in the car now, which is 16.01 gallons.