Sally Created SmartArt That Contains First-Level and Second-Level Shapes

Multiple Choice

Sally created SmartArt that contains first-level and second-level shapes. When she clicks a first-level shape and then clicks the Add Shape button, where does the new shape appear?

A) as a new second-level shape
B) as a new first-level shape
C) outside of the SmartArt borders
D) above all the other shapes