Leadthrough programming is best described as:

• A. A method where the robot is guided by a human and the motion is recorded.
• B. A high-level scripting approach requiring compilers.
• C. A purely offline optimization technique.
• D. A hardware remapping procedure.

Answer: (A)

Leadthrough programming involves guiding the robot by hand so its motion is captured and recorded for later playback. This method uses a human to physically move the robot (or use a teach device) to trace the desired path, and the controller stores the positions or coordinates to reproduce the motion exactly. It’s an intuitive, hands-on way to program complex trajectories without writing code, making it especially useful for teaching repetitive tasks or delicate motions.

The other descriptions don’t fit as well: high-level scripting with compilers implies text-based programming and compilation rather than hands-on demonstrations; purely offline optimization refers to planning trajectories without real-time teaching or recording; hardware remapping deals with changing how signals map to actuators, not the method of teaching a path.