Which line of dialogue impacted nick and moved the plot forward

This question is missing the excerpt and the options. I've found the complete question online. It is the following:

Read the following story excerpt and answer the question that follows: "Come on James!" Nick called him from the street. "Let's get to the court. The guys are waiting." James looked down at his list of assignments on the computer. "Nick, I can't go today," he yelled regretfully out his window. "I am behind on my work. You are, too! You should come over and we can study together." No response from Nick. James sighed and opened his website. A short time later he heard a loud knock at the door. It was Nick. "You were right. Let's finish up and then go shoot hoops."

Which line of dialogue impacted Nick and changed direction of the story?

A. Nick called him from the street. "Let's get to the court."

B. "Nick, I can't go today," he yelled out his window.

C. "Come on James!" Nick called him from the street.

D. "You are, too! You should come over and we can study together."

The line that impacted Nick and changed the direction of the story is:

D. "You are, too! You should come over and we can study together."

Explanation:

Notice that, at the beginning of the story, Nick is quite unconcerned about his assignments. It is only when James reminds him that he is also behind that Nick pauses. He then realizes James is right, and changes his mind about going to the court to meet the others. He chooses to study with James instead. The line James says that helps Nick change his mind and the direction of the story is: D. "You are, too! You should come over and we can study together."

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