How do groupthink and group polarization differ?

$$ A$.$ Groupthink is the process in which a group develops more extreme views about someone or something. Group polarization describes how peer pressure within groups leads to poor decision making.

$$ B$.$ Groupthink describes how peer pressure within groups leads to poor decision making. Group polarization is the process in which a group develops more extreme views about someone or something.

$$ C$.$ Groupthink refers to how groups facilitate greater human effort; for example, people jog longer when they jog in groups. Group polarization refers to how some group members slack, while a few do the bulk of the work; for example, on group projects or in study groups.

$$ D$.$ Groupthink refers to how some group members slack, while a few do the bulk of the work: for example, on group projects or in study groups. Group polarization refers to how groups facilitate greater human effort; for example, people jog longer when they jog in groups.