Which Statement Best Describes the Needle Pathway for a P-ASA

Which statement best describes the needle pathway for a P-ASA nerve block?

A) Advance needle to a depth of 6 to 10 mm in the center of the canal
B) Advance needle to a depth of 4 to 6 mm within the canal
C) Advance needle parallel to the long axis of the central incisors to a depth of 6 to 10 mm into the canal
D) Using the wall of the canal as a guide, advance needle parallel to the long axis of the central incisors to depth of 6 to 10 mm into the canal