Answer:
d. Maderno’s plan
Explanation:
This is the final plan of the St. Peter’s Basilica, the plan of Carlo Maderno, who continued the plans of Michelangelo's plans by adding a nave and a narthex.
Bramante's plan was basically a square, roughly representing the top half of the image provided in the question.
It was modified by Michelangelo who added a section, then extended once more by Maderno who gave it this aspect.
The basilica was finished in 1626, 120 years after the construction began.
