In which group of statements is the conclusion not justified by the previous pair of statements? a. all cooks work in the kitchen . mary is a cook. mary works in the kitchen. b. all dinosaurs are extinct. a triceratops is a dinosaur. all triceratops are extinct. c. all squares are rectangles. all rectangles are parallelogram. all squares are parallelograms. d. all fish live in the water. some snakes live in the water. some snakes are fish.