5. Speaker 1: Is your English teacher kind? Speaker 2: She is very bookish in terms of...

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Question:

5. Speaker 1: Is your English teacher kind?
Speaker 2: She is very bookish in terms of discussing our English lessons.
What conversational maxim does the sentence above belong to?

a. implicature
b. relational maxim
c. maxim of quantity
d. maxim of quality