Which of the following is true about moderate politicians in a time of increasing polarization?

a. They are increasingly sought out to help arbitrate between those more strongly opposed to each other.
b. They are increasingly ignored by their colleagues if they will not join in being more polarized in their views.
c. They are more popular with voters, because they represent a middle way between extremes.
d. They have found it increasingly more difficult to win elections.

d. They have found it increasingly more difficult to win elections.