Answer:
D. With a sudden grunt, the spaniel leaped up after the wily chipmunk.
Step-by-step explanation:
First of all, let's see what a prepositional phrase is. It is a phrase (a combination of at least two words) that consists of a preposition and a noun/noun phrase. In the sentence above, there are two prepositional phrases: with a sudden grunt (with + a sudden grunt) and after the wily chipmunk (after + the wily chipmunk).
Sentence C could also be correct here as there are two prepositional phrases there as well; however, it also uses a dependent clause which was not specified in the question.