Read the sentence. philadelphia has distinguished itself by preserving its old buildings and the incorporation of new structures. which revision corrects the faulty parallelism? philadelphia has distinguished itself by preserving its old buildings and incorporating its new structures. philadelphia has distinguished itself by incorporating its new structures and the preservation of old buildings. philadelphia distinguishes itself, preserves its old buildings, and the incorporation of new structures. philadelphia has not only distinguished itself but also preserves its old buildings and incorporates new structures.

So the correct answer to this is

Philadelphia has distinguished itself by preserving its old buildings and incorporating its new structures.

explanation:

b the manazanar relocation center was located in california. it was used to keep japanise from spying on america.

the reasons for the harsh treatment, is because japan used tourist to take pictures and snapshots of pearl harbor.

many americans were afraid that the japanise would betray them for their mother country. through and means necessary. this means that, the leadership in japan is a lot different than it is here. culture and family ties has much to do with their outlook and worldview.