A good speaking activity is the one where :

Correct option is B

learners talk more.
A good speaking activity is one where learners talk more. The primary objective of speaking activities is to encourage student participation and give them ample opportunity to practice speaking the language. When learners are actively engaged and talk more, it helps in developing their fluency, confidence, and communication skills. Activities should be designed to maximize learner talk time and provide a supportive environment where they can experiment with and use the language freely.