The correct answer is B.

The simplified standardized approach for calculating market risk capital is primarily intended for small banks with a low concentration of trading book activity. This approach was proposed by the Basel Committee on Banking Supervision in June 2017. The committee suggested this simplified version of the standardized approach to be used by small banks that either have a low concentration of trading book activity or lack the necessary infrastructure to successfully implement the sensitivities-based method. This approach is designed to be less complex and more manageable for these types of banks, allowing them to effectively calculate their market risk capital without the need for extensive resources or sophisticated risk management systems.

Choice A is incorrect. Large systematically important banks (SIBs) are typically required to