<span>C.
to make the people of London suffer</span>
The prepositional phrase in this sentence is c. "to your sentence structure", because it is postmodifying an infinitive phrase (to bring complexity), which has the same value, in this case, as a noun phrase. Besides it is composed by a preposition (to) and a noun phrase (your sentence structure).
Option a. is a verb phrase as well as option b. In the same way, letter d. is not a prepositional phrase as it is an adjective phrase used in the comparative form.
He believes that middle and upper class black Americans are primarily interested in effacing their history, background and culture and want to copy white people and for example as poets be like white poets and men like doctors.,lawyers etc are often marrying lighter skinned women than themselves.
The answer is c i would say it kinda makes more sense.
