Which of the following is true about AWJM?

• A. At the bottom of the kerf, the material removal is by low angle impact of the abrasive particles
• B. At the top of the kerf, the material removal is by low angle impact of the abrasive particles
• C. At the top of the kerf, the material removal is by plastic failure
• D. Striation formation occurs due to excess use of abrasive particles