Technician A says tires are available in a variety of tread patterns. Technician B says tread wear indicators are used to improve tire wear. Which technician is correct?

Technician A says that tread patterns vary from tire to tire. Technician B says radial ply tires are the most common tires used on passenger cars. Which technician is correct?

Technician A says that radial ply are the most commonly used tires. Technician B says that worn tires will improve braking and steering. Which technician is correct?

Technician A says to check manufacturer's service procedures before rotating tires. Technician B says you can always rotate tires clockwise around the vehicle at the first sign of wear. Which technician is correct?

Technician A says that poorly balanced wheels and tires can effect fuel economy. Technician B says that tires can become out of balance as the tires wear. Which technician is correct?

A test is being designed to compare the wearing quality of two brands of automobile tires. The automobiles will be selected and equipped with the new tires and then driven under "normal" conditions for one month. Then a measurement will be taken to determine how much wear took place. If a sample of cars will be selected randomly, equipped with one tire of brand A, and one tire of brand B (the other two tires are not part of the test), and driven for a month.