Fill in the Blanks $| \boldsymbol { p } |$ | Represent the Focal Length (The Distance Between the Vertex

Multiple Choice

Fill in the blanks. Le $| \boldsymbol { p } |$ | represent the focal length (the distance between the vertex and the focus) .
-If the focal diameter of a parabola is 8 units, then the focal length is ________ units.

A) 2
B) 4
C) -2
D) 32