Pledging to vote can help a candidate all of the following ways EXCEPT:

Pledging to vote for a candidate would be only positive for this candidate: so we have to choose an option that would not be a positive outcome for this candidate.

Such an option is "making the candidate appear weaker" and indeed, pledging to vote for a candidate would not make this candidate appear weaker.  (answer B)

Explanation:

the alfred thayer mahan award for literary achievement is awarded each year by the navy league of the united states. the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation. presented since 1957, "this award for literary achievement is awarded to a u.s. navy officer, u.s. marine corps officer, enlisted service member, or civilian who has made a notable literary contribution that has advanced the knowledge of the importance of sea power in the united states."[1]