ANSWER: D. Dani should use Shape Effects for each original shape to add a Reflection effect under each one.
EXPLANATION: Dani should use the Shape Effects for the original shapes because that would add a reflection effect under each individual shapes. As Dani wants to portray the shapes as if they are resting on ice rink, it is usual for ice rinks to reflect images on it. The shape reflection that would be added by the Shape effect will be similar to what it should look like if any thing reflects on ice rink.