Why was the math teacher not very successful?

Correct option is A

Explanation:

Effective teaching involves active engagement and two-way communication; lack of interaction leads to poor understanding and student disengagement.

Information Booster:

Interactive pedagogy fosters better teacher-student rapport, understanding, and achievement, as documented in best practice guides.

Additional Knowledge:

(2) is related but less precise; indifference results from lack of interaction.

(3) and (4) focus on outcomes or distractions, not the root interaction gap.