In What Ways Do Surface Datum Feature Symbol Applications, Axis

Multiple Choice

In what ways do surface datum feature symbol applications, axis datum symbol applications, and center plane datum symbol applications differ from each other?

A) When surface datums are shown on extension lines, they are offset from the dimension line arrows, while axis datums and center plane datums can align with dimension line arrowhead.
B) In surface datum symbols the equilateral triangle is filled, while in axis datums and center plane datums the equilateral triangle is left unfilled.
C) Axis datums and center plane datums are verified from one of the existing surfaces.
D) The surface datum is the only one to position the part in relation to a datum reference frame.
E) none of the above