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why are most car tires considered pneumatic?
select one:
a. because they mount on a rigid wheel assembly
b. because they contain many reinforcing strands
c. because they contact the road and divert water away
d. because they are filled with pressurized air

Explanation:

The term "pneumatic" refers to something that is operated by or filled with compressed air. Car tires are filled with pressurized air which gives them the ability to support the weight of the vehicle and provide a smooth ride.

Answer:

D. Because they are filled with pressurized air