Which phrase is an example of effective speaking in a classroom discussion?

“I can’t believe you feel that way! Listen to me, I’ll change your mind.”
“Wow! Where did you find that unbelievable information?”
“In my personal opinion, the only way to answer the question is . . .”
“I can understand your feelings, but my research shows that . . .”

“I can understand your feelings, but my research shows that . . .”