The following 8 truck models will be used in an experiment with two treatments. The trucks are listed according to their make and size. If the experiment uses a block design based on the size of the trucks, which of the following is not a possible list of trucks that receive the first treatment? (A) Colorado, Sierra, Frontier, Tundra
(B) Colorado, Canyon, Titan, Tacoma
(C) Colorado, Silverado, Canyon, Sierra
(D) Canyon, Frontier, Titan, Tundra
(E) Silverado, Frontier, Titan, Tacoma
Mid size Full size
Chevy Colorado Silverado
GMC Canyon Sierra
Nissan Frontier Titan,
Toyota Tacoma Tundra