$1.$True or False: The classification of crude oil is based on its API gravity and sulfur content, and higher API gravity indicates a heavier crude oil.

True or False: In the desalting process, salt and water are removed from crude oil to prevent corrosion, and this process also significantly reduces the oil's viscosity.

True or False: Stabilization of crude oil aims to remove light ends to prevent vapor pressure build$-$up in storage tanks, and it increases the oil's API gravity.

True or False: Fractional distillation separates crude oil into fractions based on boiling points, and it cannot separate components with very close boiling points effectively.