Political scientist: It is not uncommon for a politician to criticize his or her political opponents by claiming that...

Anita on April 14, 2018

The correct answer is D. Let's look at the statement and reorder it a bit:

Premise: Politicians sometimes criticize their opponents for being muddled.
Premise: Political agendas must be understood by large numbers of people and have commonality of purpose.
Conclusion: Therefore, this criticism is insincere.

As you can see there, the answer would be D, that the criticism is insincere.

You can try this yourself if you're looking for a conclusion: Try putting "therefore" in front of each part of the sentence to see if it makes sense.

For example, if we had:

-Politicians sometimes criticize their opponents for being muddled.
-The criticism is insincere.
-Therefore, political agendas must be understood by large numbers of people...

It wouldn't make sense. It jumps around too much and doesn't follow logically.

Let me know if that all makes sense for you.