The most credible headline is Option B: 'Candidate Withdraws from Senate Race over Discriminatory Comments.'
The most credible headline out of the options provided is: Option B: "Candidate Withdraws from Senate Race over Discriminatory Comments." This headline clearly states the reason for the candidate's withdrawal, lending credibility to the news being reported.
In contrast, options A, C, and D use informal language, sensationalism, or lack specificity, making them less credible choices for a headline.
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