Final answer:
The school director pointed out the paradox of classroom discipline, where neither ignoring nor too strict enforcement is ideal.
Step-by-step explanation:
The correct pair of words to fill in the blanks in the provided sentence is:
c. Paradox
f. mitigate
In her opening remarks, the school's director emphasized with the apparent **paradox** of taking disciplinary action in the classroom; on the one hand, teachers can ill-afford to **mitigate** indisputable disruptive behaviors, while on the other, overly strict administration can actually foster such behaviors.
This sentence highlights the paradoxical nature of handling disciplinary issues in the classroom: while it's crucial for teachers to mitigate or address disruptive behaviors, an excessively strict approach from the administration can paradoxically lead to the exacerbation or fostering of such behaviors.