A prepositional phrase may functions as :

Prepositional Phrase
A prepositional phrase consists of a preposition followed by its object (usually a noun phrase).
Example: A singer with passion. 

Prepositional phrases function as either adjective modifying nouns or adverbs modifying verbs.
- As an adjective: I know the policeman with the radio. 
- As an adverb: Lee lives in that fridge. (These types of prepositional phrases are adverbial prepositions)

সুতরাং, সঠিক উত্তর হবে, Both B+C 

Source: Oxford Practice Grammar by J. Eastwood & Cambridge Dictionary Grammar reference