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.
What? ( filling in the 20 characters
Cinderella and the Narrator/Mysterious Man had the last bow.
Answer:
1)My father likes group of animals
2)Grace enjoys producing sugarcane juice.
