The correct answer is A. Carbon black.
Carbon black is a fine black powder produced by incomplete combustion of heavy petroleum products such as coal tar, natural gas, or petroleum. It is used as a filler in rubber tires to improve their strength, durability, and resistance to wear.
Coal is a solid fossil fuel formed from the remains of ancient plants that have been buried and subjected to intense heat and pressure over millions of years. It is used as a fuel in power plants and factories, and as a raw material in the production of steel, chemicals, and other products.
Coke is a solid fuel produced by heating coal in the absence of air. It is used in blast furnaces to produce iron and steel, and as a fuel in power plants and factories.
Graphite is a form of carbon that is soft and slippery. It is used as a lubricant, as a conductor of electricity, and in the production of pencils.
In conclusion, carbon black is the only option that is used as a filler in rubber tires.