Read the following sentence.
My friend's dog, Timmy, is a huge, gray mastiff.
How many prepositional phrases are there in the above sentence?
A.
1: huge, gray mastiff
B. 2: Timmy is; huge, gray mastiff
C. 3: My friend's dog; Timmy is; huge, gray mastiff
D. 0: the sentence does not contain any prepositional phrases