Phil Is Performing a Heel Puncture

Multiple Choice

Phil is performing a heel puncture. He is inspecting the infant's heel for an appropriate puncture site. Phil gently, yet firmly, holds the infants heel, while imagining a V-shaped boundary line, with the center point at the back of the heel. Phil chooses his puncture site on the left side of the heel, on the outside of the V-shaped boundary line. What (if anything) has Phil done wrong?

A) Phil should have chosen a site inside the V-shaped boundary.
B) Phil should have inverted the V-shaped boundary line.
C) Phil should have used a circle-shaped boundary line.
D) Phil did not do anything wrong.