One reason why polarization between parties is increasing is due to that are inexpensive shortcuts to become informed.

Increasing impact of elite cues, is the right answer.

Explanation:

The divergence of political views to ideological extremes is known as polarization. In political science, polarization is considered in the context of political parties and democratic arrangements of government. It is indicated by votes, where a preponderance of voting Democrats give opposition to a majority of voting Republicans. One of the main reasons why political polarization increasing is due to Increasing impact of elite cues.

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