Final answer:
In French, the appropriate relative pronoun to fill in the blank is 'ce que'
Step-by-step explanation:
The appropriate relative pronoun to fill in the blank would be ce que.
In French, the relative pronoun 'ce que' is used to refer to an object or an action. It is used when the verb in the subordinate clause is transitive, meaning it takes a direct object.
For example: 'Je me demande ce que il dit' translates to 'I wonder what he is saying'.
Learn more about Relative pronouns in French