Which of the following sentences contains a perfect participle?

a. Having perfected the design, the architect was eager to present his blueprints.
b.Reaching the end of the race was Keisha's ultimate goal.
c.The bus careened around the corner, zooming by frightened pedestrians.
d.Dylan left the gate to the llama enclosure open, which allowed them to make their escape.

Its 50 points and a brianliest sooooooooo...... HURRYYYYY!!!!!!!!!!!!!!!!