The correct answer is D) pointing toward the motor end of the machine. The teeth of the power hacksaw blade should be installed pointing toward the motor end of the machine. This orientation ensures that the teeth cut through the material effectively as the blade moves back and forth. With the teeth pointing toward the motor, the cutting action will be more efficient and the blade will be less likely to bind or jump during operation. The other answer choices are incorrect because B) and C) do not specify the optimal orientation for the blade teeth, while A) suggests an incorrect pattern based on the number of teeth on the blade.