To solve this question, we should focus on the second sentence.
"But voters actually elect politicians who instead promise that the government will provide assistance to solve their most pressing problems."
Then everything is clear.
(A) Politicians who win their elections usually keep their campaign promises
Politicians who win their elections -> Politicians who promise that goverment will provide assisstance -> Keep their promises -> intrusions reraley reduce.
"But voters actually elect politicians who instead promise that the government will provide assistance to solve their most pressing problems."
Then everything is clear.
(A) Politicians who win their elections usually keep their campaign promises
Politicians who win their elections -> Politicians who promise that goverment will provide assisstance -> Keep their promises -> intrusions reraley reduce.




