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15. Which muscle groups are primarily targeted by both Bird Dog and Dead Bug exercises? A) Chest and biceps O B) Core muscles, including abs, lower back, and hip muscles c) Calves and quadriceps ( D) Shoulders and triceps * 1 point 24. You are observing a classmate performing the Dead Bug. He cannot keep his lower back flat when lowering his leg and arm. How can he modify the exercise to maintain proper form? A) Increase the speed of the repetitions O B) Lift both arms and both legs at the same time C) Add ankle weights for more challenge D) Decrease the range of motion