Although the new marketing strategy seemed at first glance to be highly innovative, it was actually nothing more than a rehash of older, previously unsuccessful campaigns.

The correct answer to the question "Although the new marketing strategy seemed at first glance to be highly innovative, it was actually nothing more than a rehash of older, previously unsuccessful campaigns." is Option B: ...it was actually a rehash of previously unsuccessful campaigns..

The other options — A) ...it was actually nothing more than a rehash of older, previously unsuccessful campaigns., C) ...it was actually nothing more than a rehash of older, unsuccessful campaigns from the past., D) ...it was actually a rehash of older campaigns that had been unsuccessful. — are incorrect for this GMAT Exam Prep question. As explained above: The phrase 'nothing more than a rehash of older' is redundant. A 'rehash' inherently implies something old or previously done. Option B is the most concise and precise, removing the redundant terms w…