Which sentence contains a prepositional phrase?

a. they sang it, and sang it again.
b. they tried, although they didn't expect to win.
c. with the proper , they'll complete the project early.
d. running all the way, he got there early.

The correct answer is C. With the proper help, they'll complete the project early. This sentence contains a prepositional phrase since the word "with" is a preposition. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help. 

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