Which sentence contains a prepositional phrase?
A. Running all the way, he got there early.
B. With the proper help, they'll complete the project early.
C. They sang it, and sang it again.
D. They tried, although they didn't expect to win.
A prepositional phrase typically begins with a preposition, that is a word that specifies the relationship between two concepts, such as "near" or "away"
Here the preposition is "with" and the phrase is "with the proper help" - answer B (the "with" specifies a relation between "they" and "help"
