Premise : the candidate with the most campaign money ultimately wins.
Conclusion :Expensive television advertising campaigns clearly help political candidates win elections
Somehow candidates with more campaign money are able to go for the expensive television advertising campaigns
(A) Endorsements from minor political office-holders generally have no effect on a candidate’s chances of winning an election.
This is supporting the different conclusion about winning of election.
(B) In most cases, candidates who currently hold the office for which they seek re-election have more available campaign money than their competitors.
Even if candidates who holds the office have more campaign money than competitors the premise is true. This option doesn't say that competitors win or lose.(C) Expensive television advertising campaigns are waged most frequently by candidates who have more available campaign money than their competitors.
Yes, this shows that candidates with most campaign money somehow go for expensive advertising campaigns and that helps them to win.(D) When it comes to choosing among candidates, the voting public tends to disregard how a candidate is portrayed in television advertisements.
This is pseudo-weakener as it attacks the conclusion by saying that public disregard a candidate and makes views about his portrayal in advertisements(E) Nearly any political candidate can afford to wage some type of television advertising campaign.
This is out of scope.