Answer:
C. One: "with my dryer"
Step-by-step explanation:
Prepositional phrase is a group of words that starts with a preposition, and, besides it, contains a noun or a pronoun (at three o'clock, on the table, with all my heart, under the bed etc.)
Now, "with my dryer" seems like a no-brainer, the only question is "Is it the only prepositional phrase?"
Some might identify "to fix" as the other phrase. However, although it starts with "to" it doesn't function as a preposition here, it only serves to build an infinitive. Additionally, "fix" is a verb, not a noun nor a pronoun, so this can't be regarded as prepositional phrase by any means.