Q. Entry surface resolution is a characteristic of an ultrasonic testing system which defines its ability to:

• (A) Detect discontinuities oriented in a direction parallel to the ultrasonic beam
• (B) Detect discontinuities located in the center of a forging containing a fine metallurgical structure
• (C) Detect minute surface scratches
• (D) Detect discontinuities located just beneath the entry surface in the part being tested