Sure! We call this a pseudo-sufficient-assumption (PSA) question.
The conclusion is the first sentence, that record sales is not a mark of success. The premises are the rest of the stimulus: high sales means too trendy/pop; low sales means incompetent. The gap/assumption is that too trendy/pop or incompetence means "not successful."
(B) bridges that gap/affirms the assumption.
For those who have access: 7sage.com/lsat_explanations/lsat-60-section-3-question-24/
Comments
The conclusion is the first sentence, that record sales is not a mark of success. The premises are the rest of the stimulus: high sales means too trendy/pop; low sales means incompetent. The gap/assumption is that too trendy/pop or incompetence means "not successful."
(B) bridges that gap/affirms the assumption.
For those who have access:
7sage.com/lsat_explanations/lsat-60-section-3-question-24/