Explanation:

According to Standard I(B) - Independence and Objectivity, members and candidates must adhere to strict conduct standards when producing issuer-paid research. While they are not prohibited from accepting cash compensation, they must avoid any form of compensation that could influence the research's objectivity, such as equity-based incentives.

• Option A is incorrect because the standard does not outright prohibit cash compensation but restricts compensation that could bias the research.

• Option B is correct because the standard mandates full disclosure of any potential conflicts of interest, including the nature of the compensation received, to maintain transparency and objectivity.

• Option C is incorrect because members are not required to decline writing the report solely due to their firm's investment banking relationship with the issuer. However, they must disclose such conflicts to ensure the report's integrity.