Marty Is Working with a Few Other Students from His

Marty is working with a few other students from his psychology class on a group project. While discussing the project, one of his classmates, Nina, makes a statement that Marty believes is untrue. The rest of the group agrees with Nina. As a critical thinker, it would be most appropriate for Marty to

A) let Nina's statement go so that the group doesn't consider him a troublemaker.
B) assume that he is probably wrong because everyone else seems to think Nina is right.
C) wait to see if any of his group mates disagree before speaking up.
D) ask Nina to explain her statement and challenge it if it still seems inaccurate.