Which is the least mature grip on a writing implement?

• A. Tripod grip with the implement resting on the index finger, near the tip
• B. Fist grip with the thumb away from the point
• C. Fist grip with the thumb toward the point
• D. Tripod grip with fingers well away from the tip

The least mature grip on a writing implement is C. Fist grip with the thumb toward the point.