Can u show us the letter, please?
I wanna say that your answer is B. Let me know if you get it right!
Answer:
1.
an exchange of diverging or opposite views, typically a heated or angry one.
2.
a reason or set of reasons given with the aim of persuading others that an action or idea is right or wrong.
Concept checking is the process of a teacher asking questions to their students to make sure they understand the vocabulary/grammar you have taught them. =)
