The Working Stroke Used with an Ultrasonic Tip Is in a Coronal

The working stroke used with an ultrasonic tip is in a coronal to apical direction (starting beneath the gingival margin and moving toward the junctional epithelium) . The working stroke with a hand instrument moves in an apical to coronal direction (starting at the junctional epithelium and moving toward the gingival margin) .

A) Both statements are TRUE
B) The first statement is TRUE; the second FALSE
C) The first statement is FALSE; the second TRUE
D) Both statements are FALSE