Final answer:
The correct interrogatory word to use in the dialogue is 'quién' (B), which translates to 'who' in English.
Explanation:
The appropriate interrogatory word to fill in the blank in the dialogue is quién (B).
Interrogatory words in Spanish, like the question word '¿Con quién estudias?' in the given dialogue, help form questions by asking who, what, where, when, why, or how.
Using the correct interrogatory word is essential in forming meaningful questions in Spanish conversations or written exchanges.
Learn more about Interrogative Words in Spanish here:
https://brainly.com/question/43589613
