Answer :
An Ideological sorting relates to the actions of the leader after the party gains influence in the parliament.
What is an Ideological sorting?
This refers to an effect whereby the voters sort themselves into parties that match their ideology and this allows partisans to subscribe to increasingly extreme positions.
Hence, this effect is one that most relates to the actions of the leader after the party gains influence in the parliament.
Therefore, the Option B is correct.
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