Final answer:
The appropriate pronoun to fill in the blank would be 'me'. It is used as the object form of the pronoun 'I' in the given dialogue.
Step-by-step explanation:
In the given dialogue, the appropriate pronoun to fill in the blank would be C. me.
The pronoun 'me' is used as the object form of the pronoun 'I'. It is used when the speaker is the object of the verb or preposition. In this case, the pronoun 'me' is used to represent the receiver of an action or the object of a preposition in the dialogue.
For example:
'Do you want to go with me to the park?'
Learn more about Pronouns in French